624020402 has 4 divisors (see below), whose sum is σ = 936030606. Its totient is φ = 312010200.

The previous prime is 624020389. The next prime is 624020407. The reversal of 624020402 is 204020426.

624020402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 427207561 + 196812841 = 20669^2 + 14029^2 .

It is a super-2 number, since 2×624020402² = 778802924224483208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (624020407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156005099 + ... + 156005102.

Almost surely, 2^624020402 is an apocalyptic number.

624020402 is a deficient number, since it is larger than the sum of its proper divisors (312010204).

624020402 is a wasteful number, since it uses less digits than its factorization.

624020402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312010203.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 624020402 is about 24980.4003570799. The cubic root of 624020402 is about 854.5410493559.

Adding to 624020402 its reverse (204020426), we get a palindrome (828040828).

The spelling of 624020402 in words is "six hundred twenty-four million, twenty thousand, four hundred two".