55860405 has 16 divisors (see below), whose sum is σ = 90383040. Its totient is φ = 29456768.

The previous prime is 55860383. The next prime is 55860421. The reversal of 55860405 is 50406855.

It is a cyclic number.

It is not a de Polignac number, because 55860405 - 2⁶ = 55860341 is a prime.

It is a congruent number.

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, 19587 + ... + 22256.

It is an arithmetic number, because the mean of its divisors is an integer number (5648940).

Almost surely, 2^55860405 is an apocalyptic number.

It is an amenable number.

55860405 is a deficient number, since it is larger than the sum of its proper divisors (34522635).

55860405 is a wasteful number, since it uses less digits than its factorization.

55860405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41940.

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 55860405 is about 7473.9818704624. The cubic root of 55860405 is about 382.2680724804.

It can be divided in two parts, 55860 and 405, that added together give a palindrome (56265).

The spelling of 55860405 in words is "fifty-five million, eight hundred sixty thousand, four hundred five".