438864156 has 60 divisors (see below), whose sum is σ = 1155768768. Its totient is φ = 145205568.

The previous prime is 438864131. The next prime is 438864161. The reversal of 438864156 is 651468834.

438864156 is a `hidden beast` number, since 438 + 8 + 64 + 156 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 39445 + ... + 49331.

Almost surely, 2^438864156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 438864156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (577884384).

438864156 is an abundant number, since it is smaller than the sum of its proper divisors (716904612).

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

438864156 is a wasteful number, since it uses less digits than its factorization.

438864156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10040 (or 10029 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 438864156 is about 20949.0848487470. The cubic root of 438864156 is about 759.9354492728.

The spelling of 438864156 in words is "four hundred thirty-eight million, eight hundred sixty-four thousand, one hundred fifty-six".