190631420928 has 132 divisors (see below), whose sum is σ = 592786316668. Its totient is φ = 58655784960.

The previous prime is 190631420899. The next prime is 190631420929. The reversal of 190631420928 is 829024136091.

190631420928 is a `hidden beast` number, since 1 + 9 + 0 + 631 + 4 + 2 + 0 + 9 + 2 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27518828544 + 163112592384 = 165888^2 + 403872^2 .

It is not an unprimeable number, because it can be changed into a prime (190631420929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 675763 + ... + 915378.

Almost surely, 2^190631420928 is an apocalyptic number.

190631420928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

190631420928 is an abundant number, since it is smaller than the sum of its proper divisors (402154895740).

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

190631420928 is a wasteful number, since it uses less digits than its factorization.

190631420928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591180 (or 1591159 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 190631420928 in words is "one hundred ninety billion, six hundred thirty-one million, four hundred twenty thousand, nine hundred twenty-eight".