1881230690 has 32 divisors (see below), whose sum is σ = 3478265280. Its totient is φ = 732308544.

The previous prime is 1881230671. The next prime is 1881230699. The reversal of 1881230690 is 960321881.

It is a super-2 number, since 2×1881230690² = 7078057817995752200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1881230699) 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, 38696 + ... + 72524.

It is an arithmetic number, because the mean of its divisors is an integer number (108695790).

Almost surely, 2^1881230690 is an apocalyptic number.

1881230690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1881230690 is a deficient number, since it is larger than the sum of its proper divisors (1597034590).

1881230690 is a wasteful number, since it uses less digits than its factorization.

1881230690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33986.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 1881230690 is about 43373.1563296931. The cubic root of 1881230690 is about 1234.4704116945.

The spelling of 1881230690 in words is "one billion, eight hundred eighty-one million, two hundred thirty thousand, six hundred ninety".