921423672 has 48 divisors (see below), whose sum is σ = 2687488440. Its totient is φ = 283514688.

The previous prime is 921423667. The next prime is 921423697. The reversal of 921423672 is 276324129.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 491278 + ... + 493149.

Almost surely, 2^921423672 is an apocalyptic number.

It is an amenable number.

921423672 is an abundant number, since it is smaller than the sum of its proper divisors (1766064768).

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

921423672 is a wasteful number, since it uses less digits than its factorization.

921423672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984452 (or 984445 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 921423672 is about 30354.9612419453. The cubic root of 921423672 is about 973.0902515303.

The spelling of 921423672 in words is "nine hundred twenty-one million, four hundred twenty-three thousand, six hundred seventy-two".