55474720 has 48 divisors (see below), whose sum is σ = 149784768. Its totient is φ = 19019520.

The previous prime is 55474697. The next prime is 55474721. The reversal of 55474720 is 2747455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55474721) 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, 23646 + ... + 25885.

It is an arithmetic number, because the mean of its divisors is an integer number (3120516).

Almost surely, 2^55474720 is an apocalyptic number.

It is an amenable number.

55474720 is an abundant number, since it is smaller than the sum of its proper divisors (94310048).

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

55474720 is a wasteful number, since it uses less digits than its factorization.

55474720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49553 (or 49545 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 34.

The square root of 55474720 is about 7448.1353371163. The cubic root of 55474720 is about 381.3862571282.

The spelling of 55474720 in words is "fifty-five million, four hundred seventy-four thousand, seven hundred twenty".