1890530390 has 32 divisors (see below), whose sum is σ = 4117863744. Its totient is φ = 610053120.

The previous prime is 1890530321. The next prime is 1890530399. The reversal of 1890530390 is 930350981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1890530399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 793151 + ... + 795530.

It is an arithmetic number, because the mean of its divisors is an integer number (128683242).

Almost surely, 2^1890530390 is an apocalyptic number.

1890530390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1890530390 is an abundant number, since it is smaller than the sum of its proper divisors (2227333354).

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

1890530390 is a wasteful number, since it uses less digits than its factorization.

1890530390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588712.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 1890530390 is about 43480.2298751973. The cubic root of 1890530390 is about 1236.5012346022.

The spelling of 1890530390 in words is "one billion, eight hundred ninety million, five hundred thirty thousand, three hundred ninety".