190540665 has 36 divisors (see below), whose sum is σ = 384196644. Its totient is φ = 87103296.

The previous prime is 190540661. The next prime is 190540699. The reversal of 190540665 is 566045091.

190540665 is a `hidden beast` number, since 190 + 5 + 406 + 65 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 102030201 + 88510464 = 10101^2 + 9408^2 .

It is not a de Polignac number, because 190540665 - 2² = 190540661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (190540661) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 41002 + ... + 45411.

It is an arithmetic number, because the mean of its divisors is an integer number (10672129).

Almost surely, 2^190540665 is an apocalyptic number.

190540665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

190540665 is an abundant number, since it is smaller than the sum of its proper divisors (193655979).

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

190540665 is a wasteful number, since it uses less digits than its factorization.

190540665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86438 (or 86428 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 190540665 is about 13803.6468007552. The cubic root of 190540665 is about 575.4344945311.

The spelling of 190540665 in words is "one hundred ninety million, five hundred forty thousand, six hundred sixty-five".