55951840 has 48 divisors (see below), whose sum is σ = 151072992. Its totient is φ = 19183104.

The previous prime is 55951793. The next prime is 55951849. The reversal of 55951840 is 4815955.

It is a self number, because there is not a number n which added to its sum of digits gives 55951840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55951849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23859 + ... + 26098.

It is an arithmetic number, because the mean of its divisors is an integer number (3147354).

Almost surely, 2^55951840 is an apocalyptic number.

It is an amenable number.

55951840 is an abundant number, since it is smaller than the sum of its proper divisors (95121152).

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

55951840 is a wasteful number, since it uses less digits than its factorization.

55951840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49979 (or 49971 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 37.

The square root of 55951840 is about 7480.0962560652. The cubic root of 55951840 is about 382.4765303782.

The spelling of 55951840 in words is "fifty-five million, nine hundred fifty-one thousand, eight hundred forty".