55647940 has 12 divisors (see below), whose sum is σ = 116860716. Its totient is φ = 22259168.

The previous prime is 55647923. The next prime is 55647961. The reversal of 55647940 is 4974655.

It can be written as a sum of positive squares in 2 ways, for example, as 7650756 + 47997184 = 2766^2 + 6928^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55647893 and 55647902.

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, 1391179 + ... + 1391218.

It is an arithmetic number, because the mean of its divisors is an integer number (9738393).

Almost surely, 2^55647940 is an apocalyptic number.

It is an amenable number.

55647940 is an abundant number, since it is smaller than the sum of its proper divisors (61212776).

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

55647940 is a wasteful number, since it uses less digits than its factorization.

55647940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2782406 (or 2782404 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 55647940 is about 7459.7546876556. The cubic root of 55647940 is about 381.7828046313.

The spelling of 55647940 in words is "fifty-five million, six hundred forty-seven thousand, nine hundred forty".