617128970 has 16 divisors (see below), whose sum is σ = 1111222368. Its totient is φ = 246764880.

The previous prime is 617128927. The next prime is 617128973. The reversal of 617128970 is 79821716.

It is a super-2 number, since 2×617128970² = 761696331226521800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (617128973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24557 + ... + 42863.

It is an arithmetic number, because the mean of its divisors is an integer number (69451398).

Almost surely, 2^617128970 is an apocalyptic number.

617128970 is a deficient number, since it is larger than the sum of its proper divisors (494093398).

617128970 is a wasteful number, since it uses less digits than its factorization.

617128970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21685.

The product of its (nonzero) digits is 42336, while the sum is 41.

The square root of 617128970 is about 24842.0806294481. The cubic root of 617128970 is about 851.3836610520.

The spelling of 617128970 in words is "six hundred seventeen million, one hundred twenty-eight thousand, nine hundred seventy".