612190920 has 64 divisors (see below), whose sum is σ = 2003538240. Its totient is φ = 148409600.

The previous prime is 612190907. The next prime is 612190951. The reversal of 612190920 is 29091216.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230571 + ... + 233210.

It is an arithmetic number, because the mean of its divisors is an integer number (31305285).

Almost surely, 2^612190920 is an apocalyptic number.

612190920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

612190920 is an abundant number, since it is smaller than the sum of its proper divisors (1391347320).

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

612190920 is a wasteful number, since it uses less digits than its factorization.

612190920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463806 (or 463802 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 612190920 is about 24742.4921946032. The cubic root of 612190920 is about 849.1067525216.

The spelling of 612190920 in words is "six hundred twelve million, one hundred ninety thousand, nine hundred twenty".