978765432 has 16 divisors (see below), whose sum is σ = 2446913640. Its totient is φ = 326255136.

The previous prime is 978765419. The next prime is 978765443. The reversal of 978765432 is 234567879.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20390923 + ... + 20390970.

Almost surely, 2^978765432 is an apocalyptic number.

It is an amenable number.

978765432 is an abundant number, since it is smaller than the sum of its proper divisors (1468148208).

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

978765432 is a wasteful number, since it uses less digits than its factorization.

978765432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40781902 (or 40781898 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 51.

The square root of 978765432 is about 31285.2270568714. The cubic root of 978765432 is about 992.8711103652.

The spelling of 978765432 in words is "nine hundred seventy-eight million, seven hundred sixty-five thousand, four hundred thirty-two".