838440456 has 32 divisors (see below), whose sum is σ = 2395544640. Its totient is φ = 239554368.

The previous prime is 838440439. The next prime is 838440457. The reversal of 838440456 is 654044838.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (838440457) 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, 2495191 + ... + 2495526.

It is an arithmetic number, because the mean of its divisors is an integer number (74860770).

Almost surely, 2^838440456 is an apocalyptic number.

It is an amenable number.

838440456 is an abundant number, since it is smaller than the sum of its proper divisors (1557104184).

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

838440456 is a wasteful number, since it uses less digits than its factorization.

838440456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4990733 (or 4990729 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 42.

The square root of 838440456 is about 28955.8363028941. The cubic root of 838440456 is about 942.9545096090.

The spelling of 838440456 in words is "eight hundred thirty-eight million, four hundred forty thousand, four hundred fifty-six".