190773640 has 32 divisors (see below), whose sum is σ = 432135000. Its totient is φ = 75794944.

The previous prime is 190773607. The next prime is 190773647. The reversal of 190773640 is 46377091.

It can be written as a sum of positive squares in 4 ways, for example, as 45185284 + 145588356 = 6722^2 + 12066^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 190773640.

It is not an unprimeable number, because it can be changed into a prime (190773647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10045 + ... + 21964.

Almost surely, 2^190773640 is an apocalyptic number.

190773640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

190773640 is an abundant number, since it is smaller than the sum of its proper divisors (241361360).

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

190773640 is a wasteful number, since it uses less digits than its factorization.

190773640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32169 (or 32165 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 190773640 is about 13812.0831158808. The cubic root of 190773640 is about 575.6689278633.

The spelling of 190773640 in words is "one hundred ninety million, seven hundred seventy-three thousand, six hundred forty".