623974728 has 128 divisors (see below), whose sum is σ = 1774483200. Its totient is φ = 181395456.

The previous prime is 623974723. The next prime is 623974823. The reversal of 623974728 is 827479326.

It is a super-2 number, since 2×623974728² = 778688922365347968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (623974723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 638176 + ... + 639152.

It is an arithmetic number, because the mean of its divisors is an integer number (13863150).

Almost surely, 2^623974728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 623974728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (887241600).

623974728 is an abundant number, since it is smaller than the sum of its proper divisors (1150508472).

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

623974728 is a wasteful number, since it uses less digits than its factorization.

623974728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111 (or 1107 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 48.

The square root of 623974728 is about 24979.4861436339. The cubic root of 623974728 is about 854.5202000054.

It can be divided in two parts, 62 and 3974728, that added together give a triangular number (3974790 = T₂₈₁₉).

The spelling of 623974728 in words is "six hundred twenty-three million, nine hundred seventy-four thousand, seven hundred twenty-eight".