191148240 has 40 divisors (see below), whose sum is σ = 592560288. Its totient is φ = 50972800.

The previous prime is 191148233. The next prime is 191148247. The reversal of 191148240 is 42841191.

It is an interprime number because it is at equal distance from previous prime (191148233) and next prime (191148247).

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 191148198 and 191148207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191148247) 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, 397986 + ... + 398465.

Almost surely, 2^191148240 is an apocalyptic number.

191148240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191148240 is an abundant number, since it is smaller than the sum of its proper divisors (401412048).

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

191148240 is a wasteful number, since it uses less digits than its factorization.

191148240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796467 (or 796461 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 191148240 is about 13825.6370558466. The cubic root of 191148240 is about 576.0454728761.

The spelling of 191148240 in words is "one hundred ninety-one million, one hundred forty-eight thousand, two hundred forty".