55739880 has 256 divisors, whose sum is σ = 217382400. Its totient is φ = 12441600.

The previous prime is 55739861. The next prime is 55739881. The reversal of 55739880 is 8893755.

55739880 is a `hidden beast` number, since 557 + 3 + 98 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (55739881) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 551830 + ... + 551930.

It is an arithmetic number, because the mean of its divisors is an integer number (849150).

Almost surely, 2^55739880 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55739880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108691200).

55739880 is an abundant number, since it is smaller than the sum of its proper divisors (161642520).

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

55739880 is a wasteful number, since it uses less digits than its factorization.

55739880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 55739880 is about 7465.9145454526. The cubic root of 55739880 is about 381.9929459695.

The spelling of 55739880 in words is "fifty-five million, seven hundred thirty-nine thousand, eight hundred eighty".