55402407 has 16 divisors (see below), whose sum is σ = 82349280. Its totient is φ = 36812736.

The previous prime is 55402397. The next prime is 55402409. The reversal of 55402407 is 70420455.

It is not a de Polignac number, because 55402407 - 2⁷ = 55402279 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55402409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5323 + ... + 11795.

It is an arithmetic number, because the mean of its divisors is an integer number (5146830).

Almost surely, 2^55402407 is an apocalyptic number.

55402407 is a deficient number, since it is larger than the sum of its proper divisors (26946873).

55402407 is a wasteful number, since it uses less digits than its factorization.

55402407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6799 (or 6793 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 55402407 is about 7443.2793176126. The cubic root of 55402407 is about 381.2204688404.

The spelling of 55402407 in words is "fifty-five million, four hundred two thousand, four hundred seven".