1922865861 has 48 divisors (see below), whose sum is σ = 3052529664. Its totient is φ = 1054620000.

The previous prime is 1922865853. The next prime is 1922865877. The reversal of 1922865861 is 1685682291.

It is not a de Polignac number, because 1922865861 - 2³ = 1922865853 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1922865861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1922865881) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3047016 + ... + 3047646.

It is an arithmetic number, because the mean of its divisors is an integer number (63594368).

Almost surely, 2^1922865861 is an apocalyptic number.

It is an amenable number.

1922865861 is a deficient number, since it is larger than the sum of its proper divisors (1129663803).

1922865861 is a wasteful number, since it uses less digits than its factorization.

1922865861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854 (or 823 counting only the distinct ones).

The product of its digits is 414720, while the sum is 48.

The square root of 1922865861 is about 43850.4944213859. The cubic root of 1922865861 is about 1243.5110905439.

The spelling of 1922865861 in words is "one billion, nine hundred twenty-two million, eight hundred sixty-five thousand, eight hundred sixty-one".