191632940 has 48 divisors (see below), whose sum is σ = 413538048. Its totient is φ = 74553024.

The previous prime is 191632937. The next prime is 191633017. The reversal of 191632940 is 49236191.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 191632940.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 380729 + ... + 381231.

It is an arithmetic number, because the mean of its divisors is an integer number (8615376).

Almost surely, 2^191632940 is an apocalyptic number.

191632940 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 191632940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206769024).

191632940 is an abundant number, since it is smaller than the sum of its proper divisors (221905108).

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

191632940 is a wasteful number, since it uses less digits than its factorization.

191632940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998 (or 996 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 191632940 is about 13843.1549872130. The cubic root of 191632940 is about 576.5319601752.

The spelling of 191632940 in words is "one hundred ninety-one million, six hundred thirty-two thousand, nine hundred forty".