938478840 has 64 divisors (see below), whose sum is σ = 3032013600. Its totient is φ = 231009792.

The previous prime is 938478811. The next prime is 938478847. The reversal of 938478840 is 48874839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (938478847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299235 + ... + 302354.

Almost surely, 2^938478840 is an apocalyptic number.

It is an amenable number.

938478840 is an abundant number, since it is smaller than the sum of its proper divisors (2093534760).

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

938478840 is a wasteful number, since it uses less digits than its factorization.

938478840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601616 (or 601612 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 51.

The square root of 938478840 is about 30634.6020049225. The cubic root of 938478840 is about 979.0574166163.

The spelling of 938478840 in words is "nine hundred thirty-eight million, four hundred seventy-eight thousand, eight hundred forty".