1900028990 has 16 divisors (see below), whose sum is σ = 3424058352. Its totient is φ = 759121344.

The previous prime is 1900028981. The next prime is 1900029007. The reversal of 1900028990 is 998200091.

It is a super-2 number, since 2×1900028990² = 7220220325680840200, 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, 102284 + ... + 119423.

It is an arithmetic number, because the mean of its divisors is an integer number (214003647).

Almost surely, 2^1900028990 is an apocalyptic number.

1900028990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1900028990 is a deficient number, since it is larger than the sum of its proper divisors (1524029362).

1900028990 is a wasteful number, since it uses less digits than its factorization.

1900028990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222571.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 1900028990 is about 43589.3219722445. The cubic root of 1900028990 is about 1238.5686288827.

The spelling of 1900028990 in words is "one billion, nine hundred million, twenty-eight thousand, nine hundred ninety".