190003998 has 32 divisors (see below), whose sum is σ = 393984000. Its totient is φ = 61015136.

The previous prime is 190003973. The next prime is 190004039. The reversal of 190003998 is 899300091.

It is a super-2 number, since 2×190003998² = 72203038511968008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103315 + ... + 105137.

It is an arithmetic number, because the mean of its divisors is an integer number (12312000).

Almost surely, 2^190003998 is an apocalyptic number.

190003998 is an abundant number, since it is smaller than the sum of its proper divisors (203980002).

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

190003998 is a wasteful number, since it uses less digits than its factorization.

190003998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2456.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 190003998 is about 13784.1937740297. The cubic root of 190003998 is about 574.8937401628.

The spelling of 190003998 in words is "one hundred ninety million, three thousand, nine hundred ninety-eight".