402501438 has 12 divisors (see below), whose sum is σ = 872086488. Its totient is φ = 134167140.

The previous prime is 402501433. The next prime is 402501439. The reversal of 402501438 is 834105204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402501433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11180578 + ... + 11180613.

It is an arithmetic number, because the mean of its divisors is an integer number (72673874).

Almost surely, 2^402501438 is an apocalyptic number.

402501438 is an abundant number, since it is smaller than the sum of its proper divisors (469585050).

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

402501438 is a wasteful number, since it uses less digits than its factorization.

402501438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22361199 (or 22361196 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 402501438 is about 20062.4384858870. The cubic root of 402501438 is about 738.3390052451.

The spelling of 402501438 in words is "four hundred two million, five hundred one thousand, four hundred thirty-eight".