1904129990 has 16 divisors (see below), whose sum is σ = 3917067552. Its totient is φ = 652844544.

The previous prime is 1904129989. The next prime is 1904130013. The reversal of 1904129990 is 999214091.

It is a super-2 number, since 2×1904129990² = 7251422037634800200, 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 7 ways as a sum of consecutive naturals, for example, 13600859 + ... + 13600998.

It is an arithmetic number, because the mean of its divisors is an integer number (244816722).

Almost surely, 2^1904129990 is an apocalyptic number.

1904129990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1904129990 is an abundant number, since it is smaller than the sum of its proper divisors (2012937562).

1904129990 is a wasteful number, since it uses less digits than its factorization.

1904129990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27201871.

The product of its (nonzero) digits is 52488, while the sum is 44.

The square root of 1904129990 is about 43636.3379535909. The cubic root of 1904129990 is about 1239.4590924725.

The spelling of 1904129990 in words is "one billion, nine hundred four million, one hundred twenty-nine thousand, nine hundred ninety".