55388340 has 96 divisors (see below), whose sum is σ = 196949760. Its totient is φ = 12659328.

The previous prime is 55388327. The next prime is 55388357. The reversal of 55388340 is 4388355.

55388340 is a `hidden beast` number, since 5 + 538 + 83 + 40 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 55388295 and 55388304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3547 + ... + 11106.

It is an arithmetic number, because the mean of its divisors is an integer number (2051560).

Almost surely, 2^55388340 is an apocalyptic number.

It is an amenable number.

55388340 is an abundant number, since it is smaller than the sum of its proper divisors (141561420).

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

55388340 is a wasteful number, since it uses less digits than its factorization.

55388340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14678 (or 14670 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 55388340 is about 7442.3343112225. The cubic root of 55388340 is about 381.1882013960.

The spelling of 55388340 in words is "fifty-five million, three hundred eighty-eight thousand, three hundred forty".