55644740 has 24 divisors (see below), whose sum is σ = 123728472. Its totient is φ = 20948480.

The previous prime is 55644733. The next prime is 55644763. The reversal of 55644740 is 4744655.

It can be written as a sum of positive squares in 4 ways, for example, as 6980164 + 48664576 = 2642^2 + 6976^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55644740.

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, 81491 + ... + 82170.

It is an arithmetic number, because the mean of its divisors is an integer number (5155353).

Almost surely, 2^55644740 is an apocalyptic number.

It is an amenable number.

55644740 is an abundant number, since it is smaller than the sum of its proper divisors (68083732).

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

55644740 is a wasteful number, since it uses less digits than its factorization.

55644740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163687 (or 163685 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 35.

The square root of 55644740 is about 7459.5402003073. The cubic root of 55644740 is about 381.7754864305.

The spelling of 55644740 in words is "fifty-five million, six hundred forty-four thousand, seven hundred forty".