438394902 has 16 divisors (see below), whose sum is σ = 956498112. Its totient is φ = 132846920.

The previous prime is 438394867. The next prime is 438394921. The reversal of 438394902 is 209493834.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3321108 + ... + 3321239.

It is an arithmetic number, because the mean of its divisors is an integer number (59781132).

Almost surely, 2^438394902 is an apocalyptic number.

438394902 is an abundant number, since it is smaller than the sum of its proper divisors (518103210).

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

438394902 is a wasteful number, since it uses less digits than its factorization.

438394902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6642363.

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 438394902 is about 20937.8819845752. The cubic root of 438394902 is about 759.6644998847.

The spelling of 438394902 in words is "four hundred thirty-eight million, three hundred ninety-four thousand, nine hundred two".