655438812 has 48 divisors (see below), whose sum is σ = 1751188992. Its totient is φ = 186909120.

The previous prime is 655438807. The next prime is 655438813. The reversal of 655438812 is 218834556.

655438812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655438813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38233 + ... + 52655.

It is an arithmetic number, because the mean of its divisors is an integer number (36483104).

Almost surely, 2^655438812 is an apocalyptic number.

It is an amenable number.

655438812 is an abundant number, since it is smaller than the sum of its proper divisors (1095750180).

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

655438812 is a wasteful number, since it uses less digits than its factorization.

655438812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14978 (or 14976 counting only the distinct ones).

The product of its digits is 230400, while the sum is 42.

The square root of 655438812 is about 25601.5392505998. The cubic root of 655438812 is about 868.6484550360.

The spelling of 655438812 in words is "six hundred fifty-five million, four hundred thirty-eight thousand, eight hundred twelve".