671815260 has 72 divisors (see below), whose sum is σ = 2103593856. Its totient is φ = 173370240.

The previous prime is 671815213. The next prime is 671815271. The reversal of 671815260 is 62518176.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54619 + ... + 65778.

Almost surely, 2^671815260 is an apocalyptic number.

671815260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

671815260 is an abundant number, since it is smaller than the sum of its proper divisors (1431778596).

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

671815260 is a wasteful number, since it uses less digits than its factorization.

671815260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120443 (or 120438 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 671815260 is about 25919.3992985949. The cubic root of 671815260 is about 875.8235555055.

The spelling of 671815260 in words is "six hundred seventy-one million, eight hundred fifteen thousand, two hundred sixty".