55904240 has 40 divisors (see below), whose sum is σ = 148547040. Its totient is φ = 19166976.

The previous prime is 55904227. The next prime is 55904249. The reversal of 55904240 is 4240955.

It is a happy number.

55904240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55904249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49355 + ... + 50474.

It is an arithmetic number, because the mean of its divisors is an integer number (3713676).

Almost surely, 2^55904240 is an apocalyptic number.

It is an amenable number.

55904240 is an abundant number, since it is smaller than the sum of its proper divisors (92642800).

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

55904240 is a wasteful number, since it uses less digits than its factorization.

55904240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99849 (or 99843 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 55904240 is about 7476.9138018303. The cubic root of 55904240 is about 382.3680379792.

The spelling of 55904240 in words is "fifty-five million, nine hundred four thousand, two hundred forty".