190449990 has 48 divisors (see below), whose sum is σ = 496173600. Its totient is φ = 50683776.

The previous prime is 190449983. The next prime is 190450021. The reversal of 190449990 is 99944091.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49351 + ... + 53069.

It is an arithmetic number, because the mean of its divisors is an integer number (10336950).

Almost surely, 2^190449990 is an apocalyptic number.

190449990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

190449990 is an abundant number, since it is smaller than the sum of its proper divisors (305723610).

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

190449990 is a wasteful number, since it uses less digits than its factorization.

190449990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4301 (or 4298 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 190449990 is about 13800.3619517750. The cubic root of 190449990 is about 575.3432002803.

The spelling of 190449990 in words is "one hundred ninety million, four hundred forty-nine thousand, nine hundred ninety".