1814789640 has 32 divisors (see below), whose sum is σ = 5444369280. Its totient is φ = 483943872.

The previous prime is 1814789633. The next prime is 1814789663. The reversal of 1814789640 is 469874181.

It is a super-2 number, since 2×1814789640² = 6586922874902659200, 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 1814789640.

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, 7561504 + ... + 7561743.

It is an arithmetic number, because the mean of its divisors is an integer number (170136540).

Almost surely, 2^1814789640 is an apocalyptic number.

1814789640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1814789640 is an abundant number, since it is smaller than the sum of its proper divisors (3629579640).

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

1814789640 is a wasteful number, since it uses less digits than its factorization.

1814789640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15123261 (or 15123257 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 1814789640 is about 42600.3478859035. The cubic root of 1814789640 is about 1219.7629298381.

The spelling of 1814789640 in words is "one billion, eight hundred fourteen million, seven hundred eighty-nine thousand, six hundred forty".