1861972804 has 24 divisors (see below), whose sum is σ = 3493808640. Its totient is φ = 865128576.

The previous prime is 1861972769. The next prime is 1861972817. The reversal of 1861972804 is 4082791681.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167932 + ... + 178675.

It is an arithmetic number, because the mean of its divisors is an integer number (145575360).

Almost surely, 2^1861972804 is an apocalyptic number.

It is an amenable number.

1861972804 is a deficient number, since it is larger than the sum of its proper divisors (1631835836).

1861972804 is a wasteful number, since it uses less digits than its factorization.

1861972804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346707 (or 346705 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 1861972804 is about 43150.5828929344. The cubic root of 1861972804 is about 1230.2435906833.

The spelling of 1861972804 in words is "one billion, eight hundred sixty-one million, nine hundred seventy-two thousand, eight hundred four".