1840831272 has 80 divisors (see below), whose sum is σ = 5892622560. Its totient is φ = 525950496.

The previous prime is 1840831261. The next prime is 1840831277. The reversal of 1840831272 is 2721380481.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1840831277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 198378 + ... + 207449.

It is an arithmetic number, because the mean of its divisors is an integer number (73657782).

Almost surely, 2^1840831272 is an apocalyptic number.

1840831272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1840831272 is an abundant number, since it is smaller than the sum of its proper divisors (4051791288).

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

1840831272 is a wasteful number, since it uses less digits than its factorization.

1840831272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405852 (or 405839 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 1840831272 is about 42904.9096491299. The cubic root of 1840831272 is about 1225.5696413849.

The spelling of 1840831272 in words is "one billion, eight hundred forty million, eight hundred thirty-one thousand, two hundred seventy-two".