671868972 has 24 divisors (see below), whose sum is σ = 1741882800. Its totient is φ = 223956288.

The previous prime is 671868919. The next prime is 671868973. The reversal of 671868972 is 279868176.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (671868973) 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, 3110397 + ... + 3110612.

It is an arithmetic number, because the mean of its divisors is an integer number (72578450).

Almost surely, 2^671868972 is an apocalyptic number.

It is an amenable number.

671868972 is an abundant number, since it is smaller than the sum of its proper divisors (1070013828).

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

671868972 is a wasteful number, since it uses less digits than its factorization.

671868972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6221022 (or 6221014 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 671868972 is about 25920.4354130096. The cubic root of 671868972 is about 875.8468957421.

The spelling of 671868972 in words is "six hundred seventy-one million, eight hundred sixty-eight thousand, nine hundred seventy-two".