1900821140 has 12 divisors (see below), whose sum is σ = 3991724436. Its totient is φ = 760328448.

The previous prime is 1900821103. The next prime is 1900821157. The reversal of 1900821140 is 411280091.

It can be written as a sum of positive squares in 2 ways, for example, as 734735236 + 1166085904 = 27106^2 + 34148^2 .

It is a super-2 number, since 2×1900821140² = 7226242012541799200, 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 3 ways as a sum of consecutive naturals, for example, 47520509 + ... + 47520548.

It is an arithmetic number, because the mean of its divisors is an integer number (332643703).

Almost surely, 2^1900821140 is an apocalyptic number.

1900821140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1900821140 is an abundant number, since it is smaller than the sum of its proper divisors (2090903296).

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

1900821140 is a wasteful number, since it uses less digits than its factorization.

1900821140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95041066 (or 95041064 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 1900821140 is about 43598.4075397256. The cubic root of 1900821140 is about 1238.7407307869.

The spelling of 1900821140 in words is "one billion, nine hundred million, eight hundred twenty-one thousand, one hundred forty".