56000000 has 140 divisors (see below), whose sum is σ = 159841704. Its totient is φ = 19200000.

The previous prime is 55999997. The next prime is 56000003. The reversal of 56000000 is 65.

It is an interprime number because it is at equal distance from previous prime (55999997) and next prime (56000003).

It is a tau number, because it is divible by the number of its divisors (140).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56000003) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 7999997 + ... + 8000003.

Almost surely, 2^56000000 is an apocalyptic number.

56000000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79920852).

56000000 is an abundant number, since it is smaller than the sum of its proper divisors (103841704).

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

56000000 is an frugal number, since it uses more digits than its factorization.

56000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55 (or 14 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 11.

The square root of 56000000 is about 7483.3147735479. The cubic root of 56000000 is about 382.5862365545.

Adding to 56000000 its reverse (65), we get a palindrome (56000065).

The spelling of 56000000 in words is "fifty-six million", and thus it is an aban number, an eban number, and an uban number.