978645440 has 28 divisors (see below), whose sum is σ = 2330400216. Its totient is φ = 391458048.

The previous prime is 978645419. The next prime is 978645553. The reversal of 978645440 is 44546879.

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, 1528814 + ... + 1529453.

Almost surely, 2^978645440 is an apocalyptic number.

It is an amenable number.

978645440 is an abundant number, since it is smaller than the sum of its proper divisors (1351754776).

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

978645440 is a wasteful number, since it uses less digits than its factorization.

978645440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3058284 (or 3058274 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 47.

The square root of 978645440 is about 31283.3092878615. The cubic root of 978645440 is about 992.8305349439.

The spelling of 978645440 in words is "nine hundred seventy-eight million, six hundred forty-five thousand, four hundred forty".