623552820 has 48 divisors (see below), whose sum is σ = 1904672448. Its totient is φ = 151164160.

The previous prime is 623552803. The next prime is 623552821. The reversal of 623552820 is 28255326.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623552821) 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 15 ways as a sum of consecutive naturals, for example, 471729 + ... + 473048.

It is an arithmetic number, because the mean of its divisors is an integer number (39680676).

Almost surely, 2^623552820 is an apocalyptic number.

623552820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

623552820 is an abundant number, since it is smaller than the sum of its proper divisors (1281119628).

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

623552820 is a wasteful number, since it uses less digits than its factorization.

623552820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944800 (or 944798 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 623552820 is about 24971.0396259347. The cubic root of 623552820 is about 854.3275585508.

The spelling of 623552820 in words is "six hundred twenty-three million, five hundred fifty-two thousand, eight hundred twenty".