191872940 has 24 divisors (see below), whose sum is σ = 460495392. Its totient is φ = 65784960.

The previous prime is 191872939. The next prime is 191872951. The reversal of 191872940 is 49278191.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685121 + ... + 685400.

It is an arithmetic number, because the mean of its divisors is an integer number (19187308).

Almost surely, 2^191872940 is an apocalyptic number.

191872940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191872940 is an abundant number, since it is smaller than the sum of its proper divisors (268622452).

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

191872940 is a wasteful number, since it uses less digits than its factorization.

191872940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370537 (or 1370535 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 191872940 is about 13851.8208189393. The cubic root of 191872940 is about 576.7725415473.

The spelling of 191872940 in words is "one hundred ninety-one million, eight hundred seventy-two thousand, nine hundred forty".