1851942372 has 48 divisors (see below), whose sum is σ = 4948930560. Its totient is φ = 528010272.

The previous prime is 1851942353. The next prime is 1851942383. The reversal of 1851942372 is 2732491581.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17223 + ... + 63249.

It is an arithmetic number, because the mean of its divisors is an integer number (103102720).

Almost surely, 2^1851942372 is an apocalyptic number.

1851942372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1851942372 is an abundant number, since it is smaller than the sum of its proper divisors (3096988188).

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

1851942372 is a wasteful number, since it uses less digits than its factorization.

1851942372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46520 (or 46518 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 1851942372 is about 43034.2000274201. The cubic root of 1851942372 is about 1228.0305079654.

The spelling of 1851942372 in words is "one billion, eight hundred fifty-one million, nine hundred forty-two thousand, three hundred seventy-two".