1822563972 has 18 divisors (see below), whose sum is σ = 4607036798. Its totient is φ = 607521312.

The previous prime is 1822563971. The next prime is 1822564001. The reversal of 1822563972 is 2793652281.

1822563972 is a `hidden beast` number, since 1 + 8 + 2 + 2 + 5 + 639 + 7 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1782190656 + 40373316 = 42216^2 + 6354^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1822563971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25313353 + ... + 25313424.

Almost surely, 2^1822563972 is an apocalyptic number.

1822563972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1822563972 is an abundant number, since it is smaller than the sum of its proper divisors (2784472826).

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

1822563972 is a wasteful number, since it uses less digits than its factorization.

1822563972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50626787 (or 50626782 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 1822563972 is about 42691.4976546853. The cubic root of 1822563972 is about 1221.5022192119.

The spelling of 1822563972 in words is "one billion, eight hundred twenty-two million, five hundred sixty-three thousand, nine hundred seventy-two".