191464560 has 420 divisors, whose sum is σ = 787983048. Its totient is φ = 43110144.

The previous prime is 191464531. The next prime is 191464561. The reversal of 191464560 is 65464191.

191464560 is a `hidden beast` number, since 1 + 9 + 1 + 4 + 645 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (420).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191464561) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 2857647 + ... + 2857713.

Almost surely, 2^191464560 is an apocalyptic number.

191464560 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 191464560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393991524).

191464560 is an abundant number, since it is smaller than the sum of its proper divisors (596518488).

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

191464560 is an equidigital number, since it uses as much as digits as its factorization.

191464560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 191464560 is about 13837.0719445987. The cubic root of 191464560 is about 576.3630523703.

The spelling of 191464560 in words is "one hundred ninety-one million, four hundred sixty-four thousand, five hundred sixty".