55869750 has 160 divisors (see below), whose sum is σ = 163088640. Its totient is φ = 14256000.

The previous prime is 55869739. The next prime is 55869763. The reversal of 55869750 is 5796855.

55869750 is a `hidden beast` number, since 558 + 6 + 97 + 5 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 55869696 and 55869705.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 627706 + ... + 627794.

It is an arithmetic number, because the mean of its divisors is an integer number (1019304).

Almost surely, 2^55869750 is an apocalyptic number.

55869750 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55869750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81544320).

55869750 is an abundant number, since it is smaller than the sum of its proper divisors (107218890).

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

55869750 is a wasteful number, since it uses less digits than its factorization.

55869750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The square root of 55869750 is about 7474.6070130810. The cubic root of 55869750 is about 382.2893880912.

The spelling of 55869750 in words is "fifty-five million, eight hundred sixty-nine thousand, seven hundred fifty".