55579840 has 28 divisors (see below), whose sum is σ = 132350256. Its totient is φ = 22231808.

The previous prime is 55579837. The next prime is 55579861. The reversal of 55579840 is 4897555.

It is a super-2 number, since 2×55579840² = 6178237228851200, which contains 22 as substring.

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, 86524 + ... + 87163.

Almost surely, 2^55579840 is an apocalyptic number.

It is an amenable number.

55579840 is an abundant number, since it is smaller than the sum of its proper divisors (76770416).

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

55579840 is a wasteful number, since it uses less digits than its factorization.

55579840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173704 (or 173694 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 43.

The square root of 55579840 is about 7455.1887970728. The cubic root of 55579840 is about 381.6270035843.

The spelling of 55579840 in words is "fifty-five million, five hundred seventy-nine thousand, eight hundred forty".