55908438 has 16 divisors (see below), whose sum is σ = 115424256. Its totient is φ = 18034920.

The previous prime is 55908421. The next prime is 55908499. The reversal of 55908438 is 83480955.

It is a self number, because there is not a number n which added to its sum of digits gives 55908438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150106 + ... + 150477.

It is an arithmetic number, because the mean of its divisors is an integer number (7214016).

Almost surely, 2^55908438 is an apocalyptic number.

55908438 is an abundant number, since it is smaller than the sum of its proper divisors (59515818).

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

55908438 is a wasteful number, since it uses less digits than its factorization.

55908438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300619.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 55908438 is about 7477.1945273612. The cubic root of 55908438 is about 382.3776087550.

It can be divided in two parts, 5590 and 8438, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 55908438 in words is "fifty-five million, nine hundred eight thousand, four hundred thirty-eight".