981478580 has 24 divisors (see below), whose sum is σ = 2062736928. Its totient is φ = 392280608.

The previous prime is 981478577. The next prime is 981478621. The reversal of 981478580 is 85874189.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7367 + ... + 44913.

It is an arithmetic number, because the mean of its divisors is an integer number (85947372).

Almost surely, 2^981478580 is an apocalyptic number.

It is an amenable number.

981478580 is an abundant number, since it is smaller than the sum of its proper divisors (1081258348).

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

981478580 is a wasteful number, since it uses less digits than its factorization.

981478580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38863 (or 38861 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 50.

The square root of 981478580 is about 31328.5585369005. The cubic root of 981478580 is about 993.7876803349.

The spelling of 981478580 in words is "nine hundred eighty-one million, four hundred seventy-eight thousand, five hundred eighty".