191374764 has 72 divisors (see below), whose sum is σ = 538691328. Its totient is φ = 51792480.

The previous prime is 191374727. The next prime is 191374801. The reversal of 191374764 is 467473191.

It is an interprime number because it is at equal distance from previous prime (191374727) and next prime (191374801).

It is a Harshad number since it is a multiple of its sum of digits (42).

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 23 ways as a sum of consecutive naturals, for example, 27169 + ... + 33479.

It is an arithmetic number, because the mean of its divisors is an integer number (7481824).

Almost surely, 2^191374764 is an apocalyptic number.

191374764 is a gapful number since it is divisible by the number (14) 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 191374764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269345664).

191374764 is an abundant number, since it is smaller than the sum of its proper divisors (347316564).

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

191374764 is a wasteful number, since it uses less digits than its factorization.

191374764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6363 (or 6342 counting only the distinct ones).

The product of its digits is 127008, while the sum is 42.

The square root of 191374764 is about 13833.8268024433. The cubic root of 191374764 is about 576.2729344050.

The spelling of 191374764 in words is "one hundred ninety-one million, three hundred seventy-four thousand, seven hundred sixty-four".