55869776 has 30 divisors (see below), whose sum is σ = 112304010. Its totient is φ = 26893888.

The previous prime is 55869763. The next prime is 55869787. The reversal of 55869776 is 67796855.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 48163600 + 7706176 = 6940^2 + 2776^2 .

Its product of digits (3175200) is a multiple of the sum of its prime divisors (378).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 160835 + ... + 161181.

It is an arithmetic number, because the mean of its divisors is an integer number (3743467).

Almost surely, 2^55869776 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 55869776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56152005).

55869776 is an abundant number, since it is smaller than the sum of its proper divisors (56434234).

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

55869776 is an equidigital number, since it uses as much as digits as its factorization.

55869776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731 (or 378 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 53.

The square root of 55869776 is about 7474.6087523027. The cubic root of 55869776 is about 382.2894473930.

The spelling of 55869776 in words is "fifty-five million, eight hundred sixty-nine thousand, seven hundred seventy-six".