1642205634 has 16 divisors (see below), whose sum is σ = 3306164160. Its totient is φ = 543776400.

The previous prime is 1642205611. The next prime is 1642205639. The reversal of 1642205634 is 4365022461.

It is a super-3 number, since 3×1642205634³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1642205595 and 1642205604.

It is not an unprimeable number, because it can be changed into a prime (1642205639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 905389 + ... + 907200.

It is an arithmetic number, because the mean of its divisors is an integer number (206635260).

Almost surely, 2^1642205634 is an apocalyptic number.

1642205634 is an abundant number, since it is smaller than the sum of its proper divisors (1663958526).

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

1642205634 is a wasteful number, since it uses less digits than its factorization.

1642205634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812745.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 1642205634 is about 40524.1364374369. The cubic root of 1642205634 is about 1179.8021390933.

The spelling of 1642205634 in words is "one billion, six hundred forty-two million, two hundred five thousand, six hundred thirty-four".