190905740 has 24 divisors (see below), whose sum is σ = 402575712. Its totient is φ = 76043520.

The previous prime is 190905739. The next prime is 190905751. The reversal of 190905740 is 47509091.

It is a self number, because there is not a number n which added to its sum of digits gives 190905740.

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, 14984 + ... + 24623.

It is an arithmetic number, because the mean of its divisors is an integer number (16773988).

Almost surely, 2^190905740 is an apocalyptic number.

190905740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

190905740 is an abundant number, since it is smaller than the sum of its proper divisors (211669972).

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

190905740 is a wasteful number, since it uses less digits than its factorization.

190905740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39857 (or 39855 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 190905740 is about 13816.8643331257. The cubic root of 190905740 is about 575.8017699751.

The spelling of 190905740 in words is "one hundred ninety million, nine hundred five thousand, seven hundred forty".