671624328 has 16 divisors (see below), whose sum is σ = 1679060880. Its totient is φ = 223874768.

The previous prime is 671624299. The next prime is 671624329. The reversal of 671624328 is 823426176.

It is a happy number.

It is a super-2 number, since 2×671624328² = 902158475922903168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (671624329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13992150 + ... + 13992197.

It is an arithmetic number, because the mean of its divisors is an integer number (104941305).

Almost surely, 2^671624328 is an apocalyptic number.

It is an amenable number.

671624328 is an abundant number, since it is smaller than the sum of its proper divisors (1007436552).

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

671624328 is a wasteful number, since it uses less digits than its factorization.

671624328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27984356 (or 27984352 counting only the distinct ones).

The product of its digits is 96768, while the sum is 39.

The square root of 671624328 is about 25915.7158496539. The cubic root of 671624328 is about 875.7405770454.

The spelling of 671624328 in words is "six hundred seventy-one million, six hundred twenty-four thousand, three hundred twenty-eight".