623451220 has 24 divisors (see below), whose sum is σ = 1496283264. Its totient is φ = 213754656.

The previous prime is 623451211. The next prime is 623451253. The reversal of 623451220 is 22154326.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2226472 + ... + 2226751.

It is an arithmetic number, because the mean of its divisors is an integer number (62345136).

Almost surely, 2^623451220 is an apocalyptic number.

It is an amenable number.

623451220 is an abundant number, since it is smaller than the sum of its proper divisors (872832044).

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

623451220 is a wasteful number, since it uses less digits than its factorization.

623451220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4453239 (or 4453237 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 623451220 is about 24969.0051864306. The cubic root of 623451220 is about 854.2811554278.

The spelling of 623451220 in words is "six hundred twenty-three million, four hundred fifty-one thousand, two hundred twenty".