1923859890972 has 48 divisors (see below), whose sum is σ = 5004031845120. Its totient is φ = 639197737776.

The previous prime is 1923859890949. The next prime is 1923859891049. The reversal of 1923859890972 is 2790989583291.

1923859890972 is a `hidden beast` number, since 1 + 9 + 2 + 385 + 98 + 90 + 9 + 72 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1923859890972.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28979088 + ... + 29045399.

It is an arithmetic number, because the mean of its divisors is an integer number (104250663440).

Almost surely, 2^{1923859890972} is an apocalyptic number.

1923859890972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1923859890972 is an abundant number, since it is smaller than the sum of its proper divisors (3080171954148).

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

1923859890972 is a wasteful number, since it uses less digits than its factorization.

1923859890972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58024807 (or 58024799 counting only the distinct ones).

The product of its (nonzero) digits is 176359680, while the sum is 72.

The spelling of 1923859890972 in words is "one trillion, nine hundred twenty-three billion, eight hundred fifty-nine million, eight hundred ninety thousand, nine hundred seventy-two".