1804895140 has 12 divisors (see below), whose sum is σ = 3790279836. Its totient is φ = 721958048.

The previous prime is 1804895107. The next prime is 1804895173. The reversal of 1804895140 is 415984081.

It is an interprime number because it is at equal distance from previous prime (1804895107) and next prime (1804895173).

It can be written as a sum of positive squares in 2 ways, for example, as 1216056384 + 588838756 = 34872^2 + 24266^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1804895093 and 1804895102.

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, 45122359 + ... + 45122398.

It is an arithmetic number, because the mean of its divisors is an integer number (315856653).

Almost surely, 2^1804895140 is an apocalyptic number.

1804895140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1804895140 is an abundant number, since it is smaller than the sum of its proper divisors (1985384696).

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

1804895140 is a wasteful number, since it uses less digits than its factorization.

1804895140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90244766 (or 90244764 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 1804895140 is about 42484.0574804243. The cubic root of 1804895140 is about 1217.5421132379.

The spelling of 1804895140 in words is "one billion, eight hundred four million, eight hundred ninety-five thousand, one hundred forty".