1900979898 has 16 divisors (see below), whose sum is σ = 3814939296. Its totient is φ = 631496720.

The previous prime is 1900979891. The next prime is 1900979911. The reversal of 1900979898 is 8989790091.

It is a super-2 number, since 2×1900979898² = 7227449145200180808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1900979891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 538908 + ... + 542423.

It is an arithmetic number, because the mean of its divisors is an integer number (238433706).

Almost surely, 2^1900979898 is an apocalyptic number.

1900979898 is an abundant number, since it is smaller than the sum of its proper divisors (1913959398).

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

1900979898 is a wasteful number, since it uses less digits than its factorization.

1900979898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081629.

The product of its (nonzero) digits is 2939328, while the sum is 60.

The square root of 1900979898 is about 43600.2281874763. The cubic root of 1900979898 is about 1238.7752166768.

The spelling of 1900979898 in words is "one billion, nine hundred million, nine hundred seventy-nine thousand, eight hundred ninety-eight".