190640880 has 60 divisors (see below), whose sum is σ = 640238040. Its totient is φ = 50837376.

The previous prime is 190640869. The next prime is 190640899. The reversal of 190640880 is 88046091.

It is a happy number.

190640880 is a `hidden beast` number, since 1 + 9 + 0 + 640 + 8 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131670 + ... + 133109.

It is an arithmetic number, because the mean of its divisors is an integer number (10670634).

Almost surely, 2^190640880 is an apocalyptic number.

190640880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

190640880 is an abundant number, since it is smaller than the sum of its proper divisors (449597160).

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

190640880 is a wasteful number, since it uses less digits than its factorization.

190640880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264798 (or 264789 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 190640880 is about 13807.2763425666. The cubic root of 190640880 is about 575.5353602453.

The spelling of 190640880 in words is "one hundred ninety million, six hundred forty thousand, eight hundred eighty".