1902591140 has 12 divisors (see below), whose sum is σ = 3995441436. Its totient is φ = 761036448.

The previous prime is 1902591133. The next prime is 1902591167. The reversal of 1902591140 is 411952091.

It can be written as a sum of positive squares in 2 ways, for example, as 749445376 + 1153145764 = 27376^2 + 33958^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1902591097 and 1902591106.

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, 47564759 + ... + 47564798.

It is an arithmetic number, because the mean of its divisors is an integer number (332953453).

Almost surely, 2^1902591140 is an apocalyptic number.

1902591140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1902591140 is an abundant number, since it is smaller than the sum of its proper divisors (2092850296).

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

1902591140 is a wasteful number, since it uses less digits than its factorization.

1902591140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95129566 (or 95129564 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 1902591140 is about 43618.7017229995. The cubic root of 1902591140 is about 1239.1251069287.

The spelling of 1902591140 in words is "one billion, nine hundred two million, five hundred ninety-one thousand, one hundred forty".