55780408 has 16 divisors (see below), whose sum is σ = 107962560. Its totient is φ = 26990400.

The previous prime is 55780397. The next prime is 55780411. The reversal of 55780408 is 80408755.

It is a super-2 number, since 2×55780408² = 6222907833292928, 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 3 ways as a sum of consecutive naturals, for example, 112213 + ... + 112708.

It is an arithmetic number, because the mean of its divisors is an integer number (6747660).

Almost surely, 2^55780408 is an apocalyptic number.

It is an amenable number.

55780408 is a deficient number, since it is larger than the sum of its proper divisors (52182152).

55780408 is a wasteful number, since it uses less digits than its factorization.

55780408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224958 (or 224954 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 55780408 is about 7468.6282542379. The cubic root of 55780408 is about 382.0855048310.

The spelling of 55780408 in words is "fifty-five million, seven hundred eighty thousand, four hundred eight".