191283972 has 24 divisors (see below), whose sum is σ = 486904992. Its totient is φ = 57964800.

The previous prime is 191283947. The next prime is 191283977. The reversal of 191283972 is 279382191.

It is not an unprimeable number, because it can be changed into a prime (191283977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 724429 + ... + 724692.

It is an arithmetic number, because the mean of its divisors is an integer number (20287708).

Almost surely, 2^191283972 is an apocalyptic number.

191283972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

191283972 is an abundant number, since it is smaller than the sum of its proper divisors (295621020).

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

191283972 is a wasteful number, since it uses less digits than its factorization.

191283972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449139 (or 1449137 counting only the distinct ones).

The product of its digits is 54432, while the sum is 42.

The square root of 191283972 is about 13830.5448916520. The cubic root of 191283972 is about 576.1817882033.

The spelling of 191283972 in words is "one hundred ninety-one million, two hundred eighty-three thousand, nine hundred seventy-two".