190031688 has 192 divisors, whose sum is σ = 648760320. Its totient is φ = 48816000.

The previous prime is 190031687. The next prime is 190031707. The reversal of 190031688 is 886130091.

190031688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×190031688² = 72224084888258688, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (190031683) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 837031 + ... + 837257.

It is an arithmetic number, because the mean of its divisors is an integer number (3378960).

Almost surely, 2^190031688 is an apocalyptic number.

190031688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 190031688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324380160).

190031688 is an abundant number, since it is smaller than the sum of its proper divisors (458728632).

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

190031688 is a wasteful number, since it uses less digits than its factorization.

190031688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 401 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 190031688 is about 13785.1981487391. The cubic root of 190031688 is about 574.9216659514.

The spelling of 190031688 in words is "one hundred ninety million, thirty-one thousand, six hundred eighty-eight".