1840991412 has 24 divisors (see below), whose sum is σ = 4626081376. Its totient is φ = 566458848.

The previous prime is 1840991381. The next prime is 1840991419. The reversal of 1840991412 is 2141990481.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1840991419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5900458 + ... + 5900769.

Almost surely, 2^1840991412 is an apocalyptic number.

1840991412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1840991412 is an abundant number, since it is smaller than the sum of its proper divisors (2785089964).

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

1840991412 is a wasteful number, since it uses less digits than its factorization.

1840991412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11801247 (or 11801245 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 1840991412 is about 42906.7758285332. The cubic root of 1840991412 is about 1225.6051791398.

The spelling of 1840991412 in words is "one billion, eight hundred forty million, nine hundred ninety-one thousand, four hundred twelve".