55738840 has 16 divisors (see below), whose sum is σ = 125412480. Its totient is φ = 22295520.

The previous prime is 55738807. The next prime is 55738843. The reversal of 55738840 is 4883755.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 1393471 = 55738840 / (5 + 5 + 7 + 3 + 8 + 8 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 55738793 and 55738802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55738843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 696696 + ... + 696775.

It is an arithmetic number, because the mean of its divisors is an integer number (7838280).

Almost surely, 2^55738840 is an apocalyptic number.

It is an amenable number.

55738840 is an abundant number, since it is smaller than the sum of its proper divisors (69673640).

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

55738840 is a wasteful number, since it uses less digits than its factorization.

55738840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393482 (or 1393478 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 55738840 is about 7465.8448952547. The cubic root of 55738840 is about 381.9905702011.

The spelling of 55738840 in words is "fifty-five million, seven hundred thirty-eight thousand, eight hundred forty".