55574740 has 96 divisors (see below), whose sum is σ = 132723360. Its totient is φ = 19408896.

The previous prime is 55574737. The next prime is 55574741. The reversal of 55574740 is 4747555.

It can be written as a sum of positive squares in 16 ways, for example, as 2547216 + 53027524 = 1596^2 + 7282^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 55574740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55574741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 509806 + ... + 509914.

It is an arithmetic number, because the mean of its divisors is an integer number (1382535).

Almost surely, 2^55574740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55574740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66361680).

55574740 is an abundant number, since it is smaller than the sum of its proper divisors (77148620).

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

55574740 is a wasteful number, since it uses less digits than its factorization.

55574740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 98000, while the sum is 37.

The square root of 55574740 is about 7454.8467455743. The cubic root of 55574740 is about 381.6153305433.

The spelling of 55574740 in words is "fifty-five million, five hundred seventy-four thousand, seven hundred forty".