55783872 has 42 divisors (see below), whose sum is σ = 159896048. Its totient is φ = 18594432.

The previous prime is 55783859. The next prime is 55783883. The reversal of 55783872 is 27838755.

55783872 is a `hidden beast` number, since 5 + 578 + 3 + 8 + 72 = 666.

It is a super-2 number, since 2×55783872² = 6223680750624768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 47848 + ... + 48999.

Almost surely, 2^55783872 is an apocalyptic number.

It is an amenable number.

55783872 is an abundant number, since it is smaller than the sum of its proper divisors (104112176).

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

55783872 is a wasteful number, since it uses less digits than its factorization.

55783872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96865 (or 96852 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The square root of 55783872 is about 7468.8601539994. The cubic root of 55783872 is about 382.0934139210.

The spelling of 55783872 in words is "fifty-five million, seven hundred eighty-three thousand, eight hundred seventy-two".