56405500 has 48 divisors (see below), whose sum is σ = 124566624. Its totient is φ = 22310400.

The previous prime is 56405497. The next prime is 56405513. The reversal of 56405500 is 550465.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47919 + ... + 49081.

It is an arithmetic number, because the mean of its divisors is an integer number (2595138).

Almost surely, 2^56405500 is an apocalyptic number.

56405500 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 56405500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62283312).

56405500 is an abundant number, since it is smaller than the sum of its proper divisors (68161124).

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

56405500 is a wasteful number, since it uses less digits than its factorization.

56405500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279 (or 1267 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 56405500 is about 7510.3595120340. The cubic root of 56405500 is about 383.5074613236.

Adding to 56405500 its reverse (550465), we get a palindrome (56955965).

The spelling of 56405500 in words is "fifty-six million, four hundred five thousand, five hundred".