671378392 has 8 divisors (see below), whose sum is σ = 1258834500. Its totient is φ = 335689192.

The previous prime is 671378371. The next prime is 671378429. The reversal of 671378392 is 293873176.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41961142 + ... + 41961157.

Almost surely, 2^671378392 is an apocalyptic number.

It is an amenable number.

671378392 is a deficient number, since it is larger than the sum of its proper divisors (587456108).

671378392 is a wasteful number, since it uses less digits than its factorization.

671378392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83922305 (or 83922301 counting only the distinct ones).

The product of its digits is 381024, while the sum is 46.

The square root of 671378392 is about 25910.9704951397. The cubic root of 671378392 is about 875.6336708382.

The spelling of 671378392 in words is "six hundred seventy-one million, three hundred seventy-eight thousand, three hundred ninety-two".