672171620 has 12 divisors (see below), whose sum is σ = 1411560444. Its totient is φ = 268868640.

The previous prime is 672171587. The next prime is 672171659. The reversal of 672171620 is 26171276.

It can be written as a sum of positive squares in 2 ways, for example, as 511845376 + 160326244 = 22624^2 + 12662^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16804271 + ... + 16804310.

It is an arithmetic number, because the mean of its divisors is an integer number (117630037).

Almost surely, 2^672171620 is an apocalyptic number.

It is an amenable number.

672171620 is an abundant number, since it is smaller than the sum of its proper divisors (739388824).

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

672171620 is a wasteful number, since it uses less digits than its factorization.

672171620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33608590 (or 33608588 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 672171620 is about 25926.2727749285. The cubic root of 672171620 is about 875.9783864200.

The spelling of 672171620 in words is "six hundred seventy-two million, one hundred seventy-one thousand, six hundred twenty".