55940439 has 16 divisors (see below), whose sum is σ = 78124032. Its totient is φ = 35537568.

The previous prime is 55940431. The next prime is 55940447. The reversal of 55940439 is 93404955.

It is an interprime number because it is at equal distance from previous prime (55940431) and next prime (55940447).

It is not a de Polignac number, because 55940439 - 2³ = 55940431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55940397 and 55940406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55940431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18834 + ... + 21600.

It is an arithmetic number, because the mean of its divisors is an integer number (4882752).

Almost surely, 2^55940439 is an apocalyptic number.

55940439 is a deficient number, since it is larger than the sum of its proper divisors (22183593).

55940439 is a wasteful number, since it uses less digits than its factorization.

55940439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3086.

The product of its (nonzero) digits is 97200, while the sum is 39.

The square root of 55940439 is about 7479.3341281160. The cubic root of 55940439 is about 382.4505502309.

The spelling of 55940439 in words is "fifty-five million, nine hundred forty thousand, four hundred thirty-nine".