500021400 has 96 divisors (see below), whose sum is σ = 1560614400. Its totient is φ = 132432000.

The previous prime is 500021399. The next prime is 500021411. The reversal of 500021400 is 4120005.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87841 + ... + 93359.

It is an arithmetic number, because the mean of its divisors is an integer number (16256400).

Almost surely, 2^500021400 is an apocalyptic number.

500021400 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 500021400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (780307200).

500021400 is an abundant number, since it is smaller than the sum of its proper divisors (1060593000).

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

500021400 is a wasteful number, since it uses less digits than its factorization.

500021400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5689 (or 5680 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 500021400 is about 22361.1582884250. The cubic root of 500021400 is about 793.7118492834.

Adding to 500021400 its reverse (4120005), we get a palindrome (504141405).

The spelling of 500021400 in words is "five hundred million, twenty-one thousand, four hundred".