191241940 has 12 divisors (see below), whose sum is σ = 401608116. Its totient is φ = 76496768.

The previous prime is 191241923. The next prime is 191241961. The reversal of 191241940 is 49142191.

It can be written as a sum of positive squares in 2 ways, for example, as 78074896 + 113167044 = 8836^2 + 10638^2 .

It is a super-2 number, since 2×191241940² = 73146959229927200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4781029 + ... + 4781068.

It is an arithmetic number, because the mean of its divisors is an integer number (33467343).

Almost surely, 2^191241940 is an apocalyptic number.

191241940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191241940 is an abundant number, since it is smaller than the sum of its proper divisors (210366176).

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

191241940 is a wasteful number, since it uses less digits than its factorization.

191241940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9562106 (or 9562104 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 191241940 is about 13829.0252729540. The cubic root of 191241940 is about 576.1395824595.

The spelling of 191241940 in words is "one hundred ninety-one million, two hundred forty-one thousand, nine hundred forty".