1854645972 has 12 divisors (see below), whose sum is σ = 4327507296. Its totient is φ = 618215320.

The previous prime is 1854645937. The next prime is 1854645973. The reversal of 1854645972 is 2795464581.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1854645973) 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 3 ways as a sum of consecutive naturals, for example, 77276904 + ... + 77276927.

It is an arithmetic number, because the mean of its divisors is an integer number (360625608).

Almost surely, 2^1854645972 is an apocalyptic number.

1854645972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1854645972 is an abundant number, since it is smaller than the sum of its proper divisors (2472861324).

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

1854645972 is a wasteful number, since it uses less digits than its factorization.

1854645972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154553838 (or 154553836 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 51.

The square root of 1854645972 is about 43065.6007969238. The cubic root of 1854645972 is about 1228.6278067795.

The spelling of 1854645972 in words is "one billion, eight hundred fifty-four million, six hundred forty-five thousand, nine hundred seventy-two".