191715048 has 120 divisors (see below), whose sum is σ = 606276450. Its totient is φ = 54726336.

The previous prime is 191715047. The next prime is 191715079. The reversal of 191715048 is 840517191.

It can be written as a sum of positive squares in only one way, i.e., 190937124 + 777924 = 13818^2 + 882^2 .

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

It is not an unprimeable number, because it can be changed into a prime (191715047) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 172318 + ... + 173426.

Almost surely, 2^191715048 is an apocalyptic number.

191715048 is a gapful number since it is divisible by the number (18) 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 191715048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303138225).

191715048 is an abundant number, since it is smaller than the sum of its proper divisors (414561402).

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

191715048 is a wasteful number, since it uses less digits than its factorization.

191715048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149 (or 1121 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The square root of 191715048 is about 13846.1203230363. The cubic root of 191715048 is about 576.6142896656.

The spelling of 191715048 in words is "one hundred ninety-one million, seven hundred fifteen thousand, forty-eight".