1861004972 has 6 divisors (see below), whose sum is σ = 3256758708. Its totient is φ = 930502484.

The previous prime is 1861004941. The next prime is 1861005007. The reversal of 1861004972 is 2794001681.

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 as a sum of consecutive naturals, namely, 232625618 + ... + 232625625.

It is an arithmetic number, because the mean of its divisors is an integer number (542793118).

Almost surely, 2^1861004972 is an apocalyptic number.

It is an amenable number.

1861004972 is a deficient number, since it is larger than the sum of its proper divisors (1395753736).

1861004972 is a wasteful number, since it uses less digits than its factorization.

1861004972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465251247 (or 465251245 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 1861004972 is about 43139.3668474631. The cubic root of 1861004972 is about 1230.0303982617.

The spelling of 1861004972 in words is "one billion, eight hundred sixty-one million, four thousand, nine hundred seventy-two".