615447980 has 24 divisors (see below), whose sum is σ = 1477075488. Its totient is φ = 211010688.

The previous prime is 615447967. The next prime is 615448013. The reversal of 615447980 is 89744516.

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, 2197889 + ... + 2198168.

It is an arithmetic number, because the mean of its divisors is an integer number (61544812).

Almost surely, 2^615447980 is an apocalyptic number.

It is an amenable number.

615447980 is an abundant number, since it is smaller than the sum of its proper divisors (861627508).

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

615447980 is a wasteful number, since it uses less digits than its factorization.

615447980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4396073 (or 4396071 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 615447980 is about 24808.2240396204. The cubic root of 615447980 is about 850.6099336215.

The spelling of 615447980 in words is "six hundred fifteen million, four hundred forty-seven thousand, nine hundred eighty".