231838835640 has 32 divisors (see below), whose sum is σ = 695516507280. Its totient is φ = 61823689472.

The previous prime is 231838835629. The next prime is 231838835659. The reversal of 231838835640 is 46538838132.

It is a happy number.

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, 965995029 + ... + 965995268.

Almost surely, 2^231838835640 is an apocalyptic number.

231838835640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231838835640 is an abundant number, since it is smaller than the sum of its proper divisors (463677671640).

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

231838835640 is a wasteful number, since it uses less digits than its factorization.

231838835640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931990311 (or 1931990307 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 51.

The spelling of 231838835640 in words is "two hundred thirty-one billion, eight hundred thirty-eight million, eight hundred thirty-five thousand, six hundred forty".