56277690 has 64 divisors (see below), whose sum is σ = 159701760. Its totient is φ = 12418560.

The previous prime is 56277643. The next prime is 56277721. The reversal of 56277690 is 9677265.

It is a happy number.

It is a super-2 number, since 2×56277690² = 6334356783472200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1470 + ... + 10710.

It is an arithmetic number, because the mean of its divisors is an integer number (2495340).

Almost surely, 2^56277690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56277690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79850880).

56277690 is an abundant number, since it is smaller than the sum of its proper divisors (103424070).

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

56277690 is a wasteful number, since it uses less digits than its factorization.

56277690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9287.

The product of its (nonzero) digits is 158760, while the sum is 42.

The square root of 56277690 is about 7501.8457728748. The cubic root of 56277690 is about 383.2175773147.

The spelling of 56277690 in words is "fifty-six million, two hundred seventy-seven thousand, six hundred ninety".