1861235472 has 40 divisors (see below), whose sum is σ = 4809888576. Its totient is φ = 620192896.

The previous prime is 1861235423. The next prime is 1861235473. The reversal of 1861235472 is 2745321681.

It is a self number, because there is not a number n which added to its sum of digits gives 1861235472.

It is not an unprimeable number, because it can be changed into a prime (1861235473) 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, 187498 + ... + 197174.

Almost surely, 2^1861235472 is an apocalyptic number.

1861235472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1861235472 is an abundant number, since it is smaller than the sum of its proper divisors (2948653104).

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

1861235472 is a wasteful number, since it uses less digits than its factorization.

1861235472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13695 (or 13689 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 1861235472 is about 43142.0383384930. The cubic root of 1861235472 is about 1230.0811791223.

The spelling of 1861235472 in words is "one billion, eight hundred sixty-one million, two hundred thirty-five thousand, four hundred seventy-two".