981481604 has 24 divisors (see below), whose sum is σ = 1819630008. Its totient is φ = 461619200.

The previous prime is 981481601. The next prime is 981481609. The reversal of 981481604 is 406184189.

It can be written as a sum of positive squares in 4 ways, for example, as 324072004 + 657409600 = 18002^2 + 25640^2 .

It is a super-2 number, since 2×981481604² = 1926612277980825632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (981481601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187892 + ... + 193044.

It is an arithmetic number, because the mean of its divisors is an integer number (75817917).

Almost surely, 2^981481604 is an apocalyptic number.

It is an amenable number.

981481604 is a deficient number, since it is larger than the sum of its proper divisors (838148404).

981481604 is a wasteful number, since it uses less digits than its factorization.

981481604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7975 (or 7973 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 981481604 is about 31328.6067995371. The cubic root of 981481604 is about 993.7887009756.

The spelling of 981481604 in words is "nine hundred eighty-one million, four hundred eighty-one thousand, six hundred four".