617980902 has 32 divisors (see below), whose sum is σ = 1540940544. Its totient is φ = 160514400.

The previous prime is 617980861. The next prime is 617980903. The reversal of 617980902 is 209089716.

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 (617980903) 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, 668349 + ... + 669272.

It is an arithmetic number, because the mean of its divisors is an integer number (48154392).

Almost surely, 2^617980902 is an apocalyptic number.

617980902 is an abundant number, since it is smaller than the sum of its proper divisors (922959642).

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

617980902 is a wasteful number, since it uses less digits than its factorization.

617980902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337644.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 617980902 is about 24859.2216692317. The cubic root of 617980902 is about 851.7752526065.

The spelling of 617980902 in words is "six hundred seventeen million, nine hundred eighty thousand, nine hundred two".