55400370 has 32 divisors (see below), whose sum is σ = 135473472. Its totient is φ = 14494272.

The previous prime is 55400369. The next prime is 55400407. The reversal of 55400370 is 7300455.

It is a super-2 number, since 2×55400370² = 6138401992273800, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55400370.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15832 + ... + 19011.

It is an arithmetic number, because the mean of its divisors is an integer number (4233546).

Almost surely, 2^55400370 is an apocalyptic number.

55400370 is an abundant number, since it is smaller than the sum of its proper divisors (80073102).

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

55400370 is a wasteful number, since it uses less digits than its factorization.

55400370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34906.

The product of its (nonzero) digits is 2100, while the sum is 24.

The square root of 55400370 is about 7443.1424815060. The cubic root of 55400370 is about 381.2157966270.

The spelling of 55400370 in words is "fifty-five million, four hundred thousand, three hundred seventy".