1812868490 has 16 divisors (see below), whose sum is σ = 3332593152. Its totient is φ = 709718544.

The previous prime is 1812868483. The next prime is 1812868511. The reversal of 1812868490 is 948682181.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1928114 + ... + 1929053.

It is an arithmetic number, because the mean of its divisors is an integer number (208287072).

Almost surely, 2^1812868490 is an apocalyptic number.

1812868490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1812868490 is a deficient number, since it is larger than the sum of its proper divisors (1519724662).

1812868490 is a wasteful number, since it uses less digits than its factorization.

1812868490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3857221.

The product of its (nonzero) digits is 221184, while the sum is 47.

The square root of 1812868490 is about 42577.7933904518. The cubic root of 1812868490 is about 1219.3323611223.

The spelling of 1812868490 in words is "one billion, eight hundred twelve million, eight hundred sixty-eight thousand, four hundred ninety".