1642235430 has 64 divisors (see below), whose sum is σ = 4306348800. Its totient is φ = 397499520.

The previous prime is 1642235429. The next prime is 1642235431. The reversal of 1642235430 is 345322461.

It is an interprime number because it is at equal distance from previous prime (1642235429) and next prime (1642235431).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642235431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 230461 + ... + 237479.

It is an arithmetic number, because the mean of its divisors is an integer number (67286700).

Almost surely, 2^1642235430 is an apocalyptic number.

1642235430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1642235430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2153174400).

1642235430 is an abundant number, since it is smaller than the sum of its proper divisors (2664113370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1642235430 is a wasteful number, since it uses less digits than its factorization.

1642235430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7749.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 1642235430 is about 40524.5040685262. The cubic root of 1642235430 is about 1179.8092744506.

Adding to 1642235430 its reverse (345322461), we get a palindrome (1987557891).

It can be divided in two parts, 164223 and 5430, that added together give a triangular number (169653 = T₅₈₂).

The spelling of 1642235430 in words is "one billion, six hundred forty-two million, two hundred thirty-five thousand, four hundred thirty".