191812940 has 48 divisors (see below), whose sum is σ = 441945504. Its totient is φ = 69350400.

The previous prime is 191812927. The next prime is 191812967. The reversal of 191812940 is 49218191.

It is a self number, because there is not a number n which added to its sum of digits gives 191812940.

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, 37412 + ... + 42228.

It is an arithmetic number, because the mean of its divisors is an integer number (9207198).

Almost surely, 2^191812940 is an apocalyptic number.

191812940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191812940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220972752).

191812940 is an abundant number, since it is smaller than the sum of its proper divisors (250132564).

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

191812940 is a wasteful number, since it uses less digits than its factorization.

191812940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5018 (or 5016 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 191812940 is about 13849.6548693460. The cubic root of 191812940 is about 576.7124150206.

The spelling of 191812940 in words is "one hundred ninety-one million, eight hundred twelve thousand, nine hundred forty".