55761380 has 12 divisors (see below), whose sum is σ = 117098940. Its totient is φ = 22304544.

The previous prime is 55761347. The next prime is 55761383. The reversal of 55761380 is 8316755.

It can be written as a sum of positive squares in 2 ways, for example, as 40347904 + 15413476 = 6352^2 + 3926^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55761380.

It is not an unprimeable number, because it can be changed into a prime (55761383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1394015 + ... + 1394054.

It is an arithmetic number, because the mean of its divisors is an integer number (9758245).

Almost surely, 2^55761380 is an apocalyptic number.

It is an amenable number.

55761380 is an abundant number, since it is smaller than the sum of its proper divisors (61337560).

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

55761380 is a wasteful number, since it uses less digits than its factorization.

55761380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2788078 (or 2788076 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 55761380 is about 7467.3542838143. The cubic root of 55761380 is about 382.0420537933.

The spelling of 55761380 in words is "fifty-five million, seven hundred sixty-one thousand, three hundred eighty".