55400744 has 32 divisors (see below), whose sum is σ = 123880320. Its totient is φ = 22710336.

The previous prime is 55400743. The next prime is 55400753. The reversal of 55400744 is 44700455.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (55400743) 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, 20219 + ... + 22794.

It is an arithmetic number, because the mean of its divisors is an integer number (3871260).

Almost surely, 2^55400744 is an apocalyptic number.

It is an amenable number.

55400744 is an abundant number, since it is smaller than the sum of its proper divisors (68479576).

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

55400744 is a wasteful number, since it uses less digits than its factorization.

55400744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43049 (or 43045 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 29.

The square root of 55400744 is about 7443.1676052605. The cubic root of 55400744 is about 381.2166544696.

The spelling of 55400744 in words is "fifty-five million, four hundred thousand, seven hundred forty-four".