190001902 has 8 divisors (see below), whose sum is σ = 285445296. Its totient is φ = 94853472.

The previous prime is 190001887. The next prime is 190001909. The reversal of 190001902 is 209100091.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×190001902² = 72201445527235208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190001909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72123 + ... + 74710.

It is an arithmetic number, because the mean of its divisors is an integer number (35680662).

Almost surely, 2^190001902 is an apocalyptic number.

190001902 is a deficient number, since it is larger than the sum of its proper divisors (95443394).

190001902 is a wasteful number, since it uses less digits than its factorization.

190001902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147482.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 190001902 is about 13784.1177447089. The cubic root of 190001902 is about 574.8916262043.

Adding to 190001902 its reverse (209100091), we get a palindrome (399101993).

It can be divided in two parts, 19000 and 1902, that added together give a palindrome (20902).

The spelling of 190001902 in words is "one hundred ninety million, one thousand, nine hundred two".