1890879690 has 32 divisors (see below), whose sum is σ = 5186413440. Its totient is φ = 432201024.

The previous prime is 1890879667. The next prime is 1890879691. The reversal of 1890879690 is 969780981.

It is a super-2 number, since 2×1890879690² = 7150852004108992200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1890879690.

It is not an unprimeable number, because it can be changed into a prime (1890879691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4501885 + ... + 4502304.

It is an arithmetic number, because the mean of its divisors is an integer number (162075420).

Almost surely, 2^1890879690 is an apocalyptic number.

1890879690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1890879690 is an abundant number, since it is smaller than the sum of its proper divisors (3295533750).

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

1890879690 is a wasteful number, since it uses less digits than its factorization.

1890879690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9004206.

The product of its (nonzero) digits is 1959552, while the sum is 57.

The square root of 1890879690 is about 43484.2464577690. The cubic root of 1890879690 is about 1236.5773831240.

The spelling of 1890879690 in words is "one billion, eight hundred ninety million, eight hundred seventy-nine thousand, six hundred ninety".