1890255340 has 12 divisors (see below), whose sum is σ = 3969536256. Its totient is φ = 756102128.

The previous prime is 1890255329. The next prime is 1890255377. The reversal of 1890255340 is 435520981.

It is a self number, because there is not a number n which added to its sum of digits gives 1890255340.

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, 47256364 + ... + 47256403.

It is an arithmetic number, because the mean of its divisors is an integer number (330794688).

Almost surely, 2^1890255340 is an apocalyptic number.

1890255340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1890255340 is an abundant number, since it is smaller than the sum of its proper divisors (2079280916).

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

1890255340 is a wasteful number, since it uses less digits than its factorization.

1890255340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94512776 (or 94512774 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 1890255340 is about 43477.0668283867. The cubic root of 1890255340 is about 1236.4412662178.

The spelling of 1890255340 in words is "one billion, eight hundred ninety million, two hundred fifty-five thousand, three hundred forty".