672921408 has 56 divisors (see below), whose sum is σ = 1783518912. Its totient is φ = 223919104.

The previous prime is 672921407. The next prime is 672921409. The reversal of 672921408 is 804129276.

It is an interprime number because it is at equal distance from previous prime (672921407) and next prime (672921409).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672921407) 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, 121516 + ... + 126932.

It is an arithmetic number, because the mean of its divisors is an integer number (31848552).

Almost surely, 2^672921408 is an apocalyptic number.

It is an amenable number.

672921408 is an abundant number, since it is smaller than the sum of its proper divisors (1110597504).

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

672921408 is a wasteful number, since it uses less digits than its factorization.

672921408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6079 (or 6069 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 672921408 is about 25940.7287484373. The cubic root of 672921408 is about 876.3039749062.

The spelling of 672921408 in words is "six hundred seventy-two million, nine hundred twenty-one thousand, four hundred eight".