1642135040 has 480 divisors, whose sum is σ = 5289973920. Its totient is φ = 483065856.

The previous prime is 1642135003. The next prime is 1642135049. The reversal of 1642135040 is 405312461.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642135049) 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 47 ways as a sum of consecutive naturals, for example, 30983654 + ... + 30983706.

It is an arithmetic number, because the mean of its divisors is an integer number (11020779).

Almost surely, 2^1642135040 is an apocalyptic number.

1642135040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1642135040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2644986960).

1642135040 is an abundant number, since it is smaller than the sum of its proper divisors (3647838880).

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

1642135040 is a wasteful number, since it uses less digits than its factorization.

1642135040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1642135040 is about 40523.2654163013. The cubic root of 1642135040 is about 1179.7852333449.

The spelling of 1642135040 in words is "one billion, six hundred forty-two million, one hundred thirty-five thousand, forty".