617479884 has 72 divisors (see below), whose sum is σ = 1802292128. Its totient is φ = 174597120.

The previous prime is 617479883. The next prime is 617479909. The reversal of 617479884 is 488974716.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 617479884.

It is not an unprimeable number, because it can be changed into a prime (617479883) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11814 + ... + 37074.

Almost surely, 2^617479884 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 617479884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (901146064).

617479884 is an abundant number, since it is smaller than the sum of its proper divisors (1184812244).

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

617479884 is a wasteful number, since it uses less digits than its factorization.

617479884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25375 (or 25370 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 617479884 is about 24849.1425204171. The cubic root of 617479884 is about 851.5450027114.

It can be divided in two parts, 61747 and 9884, that added together give a triangular number (71631 = T₃₇₈).

The spelling of 617479884 in words is "six hundred seventeen million, four hundred seventy-nine thousand, eight hundred eighty-four".