1231930238 has 16 divisors (see below), whose sum is σ = 2303869824. Its totient is φ = 479972760.

The previous prime is 1231930223. The next prime is 1231930247. The reversal of 1231930238 is 8320391321.

It is a super-2 number, since 2×1231930238² = 3035304222597473288, which contains 22 as substring.

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, 3999620 + ... + 3999927.

It is an arithmetic number, because the mean of its divisors is an integer number (143991864).

Almost surely, 2^1231930238 is an apocalyptic number.

1231930238 is a deficient number, since it is larger than the sum of its proper divisors (1071939586).

1231930238 is a wasteful number, since it uses less digits than its factorization.

1231930238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7999567.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 1231930238 is about 35098.8637707832. The cubic root of 1231930238 is about 1072.0014474019.

The spelling of 1231930238 in words is "one billion, two hundred thirty-one million, nine hundred thirty thousand, two hundred thirty-eight".