56421750 has 128 divisors (see below), whose sum is σ = 175758336. Its totient is φ = 11712000.

The previous prime is 56421689. The next prime is 56421787. The reversal of 56421750 is 5712465.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 63 ways as a sum of consecutive naturals, for example, 57262 + ... + 58238.

It is an arithmetic number, because the mean of its divisors is an integer number (1373112).

Almost surely, 2^56421750 is an apocalyptic number.

56421750 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 56421750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87879168).

56421750 is an abundant number, since it is smaller than the sum of its proper divisors (119336586).

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

56421750 is a wasteful number, since it uses less digits than its factorization.

56421750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015 (or 1005 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 56421750 is about 7511.4412731512. The cubic root of 56421750 is about 383.5442863252.

The spelling of 56421750 in words is "fifty-six million, four hundred twenty-one thousand, seven hundred fifty".