231873408 has 192 divisors, whose sum is σ = 742906800. Its totient is φ = 71165952.

The previous prime is 231873403. The next prime is 231873431. The reversal of 231873408 is 804378132.

231873408 is a `hidden beast` number, since 231 + 87 + 340 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231873403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 583866 + ... + 584262.

Almost surely, 2^231873408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231873408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (371453400).

231873408 is an abundant number, since it is smaller than the sum of its proper divisors (511033392).

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

231873408 is a wasteful number, since it uses less digits than its factorization.

231873408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446 (or 415 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 231873408 is about 15227.3900587067. The cubic root of 231873408 is about 614.3515830987.

The spelling of 231873408 in words is "two hundred thirty-one million, eight hundred seventy-three thousand, four hundred eight".