978432507 has 16 divisors (see below), whose sum is σ = 1561032480. Its totient is φ = 602112096.

The previous prime is 978432463. The next prime is 978432517. The reversal of 978432507 is 705234879.

It is not a de Polignac number, because 978432507 - 2⁸ = 978432251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (978432517) 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, 1393428 + ... + 1394129.

It is an arithmetic number, because the mean of its divisors is an integer number (97564530).

Almost surely, 2^978432507 is an apocalyptic number.

978432507 is a deficient number, since it is larger than the sum of its proper divisors (582599973).

978432507 is a wasteful number, since it uses less digits than its factorization.

978432507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2787579 (or 2787573 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 978432507 is about 31279.9058022878. The cubic root of 978432507 is about 992.7585232599.

The spelling of 978432507 in words is "nine hundred seventy-eight million, four hundred thirty-two thousand, five hundred seven".