190649388 has 12 divisors (see below), whose sum is σ = 444848600. Its totient is φ = 63549792.

The previous prime is 190649387. The next prime is 190649399. The reversal of 190649388 is 883946091.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (190649383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7943713 + ... + 7943736.

Almost surely, 2^190649388 is an apocalyptic number.

It is an amenable number.

190649388 is an abundant number, since it is smaller than the sum of its proper divisors (254199212).

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

190649388 is a wasteful number, since it uses less digits than its factorization.

190649388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15887456 (or 15887454 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 190649388 is about 13807.5844375474. The cubic root of 190649388 is about 575.5439218612.

The spelling of 190649388 in words is "one hundred ninety million, six hundred forty-nine thousand, three hundred eighty-eight".