193231990 has 48 divisors (see below), whose sum is σ = 417688704. Its totient is φ = 64108800.

The previous prime is 193231963. The next prime is 193231999. The reversal of 193231990 is 99132391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193231999) 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, 8830 + ... + 21550.

It is an arithmetic number, because the mean of its divisors is an integer number (8701848).

Almost surely, 2^193231990 is an apocalyptic number.

193231990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

193231990 is an abundant number, since it is smaller than the sum of its proper divisors (224456714).

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

193231990 is a wasteful number, since it uses less digits than its factorization.

193231990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12773 (or 12766 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 37.

The square root of 193231990 is about 13900.7909846886. The cubic root of 193231990 is about 578.1311129229.

The spelling of 193231990 in words is "one hundred ninety-three million, two hundred thirty-one thousand, nine hundred ninety".