623474440 has 32 divisors (see below), whose sum is σ = 1404711000. Its totient is φ = 249053184.

The previous prime is 623474437. The next prime is 623474443. The reversal of 623474440 is 44474326.

It is an interprime number because it is at equal distance from previous prime (623474437) and next prime (623474443).

It can be written as a sum of positive squares in 4 ways, for example, as 540190564 + 83283876 = 23242^2 + 9126^2 .

It is a junction number, because it is equal to n+sod(n) for n = 623474396 and 623474405.

It is not an unprimeable number, because it can be changed into a prime (623474443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20626 + ... + 40894.

Almost surely, 2^623474440 is an apocalyptic number.

It is an amenable number.

623474440 is an abundant number, since it is smaller than the sum of its proper divisors (781236560).

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

623474440 is a wasteful number, since it uses less digits than its factorization.

623474440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21049 (or 21045 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 34.

The square root of 623474440 is about 24969.4701585757. The cubic root of 623474440 is about 854.2917609953.

The spelling of 623474440 in words is "six hundred twenty-three million, four hundred seventy-four thousand, four hundred forty".