123891672 has 32 divisors (see below), whose sum is σ = 310446000. Its totient is φ = 41201664.

The previous prime is 123891667. The next prime is 123891697. The reversal of 123891672 is 276198321.

It is a self number, because there is not a number n which added to its sum of digits gives 123891672.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5028 + ... + 16524.

Almost surely, 2^123891672 is an apocalyptic number.

123891672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123891672 is an abundant number, since it is smaller than the sum of its proper divisors (186554328).

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

123891672 is a wasteful number, since it uses less digits than its factorization.

123891672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11955 (or 11951 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The square root of 123891672 is about 11130.6635920775. The cubic root of 123891672 is about 498.5178400786.

The spelling of 123891672 in words is "one hundred twenty-three million, eight hundred ninety-one thousand, six hundred seventy-two".