391741272 has 112 divisors (see below), whose sum is σ = 1186211040. Its totient is φ = 120512448.

The previous prime is 391741271. The next prime is 391741277. The reversal of 391741272 is 272147193.

It is a super-2 number, since 2×391741272² = 306922448376355968, which contains 22 as substring.

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 (391741271) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 73233 + ... + 78399.

It is an arithmetic number, because the mean of its divisors is an integer number (10591170).

Almost surely, 2^391741272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 391741272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (593105520).

391741272 is an abundant number, since it is smaller than the sum of its proper divisors (794469768).

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

391741272 is a wasteful number, since it uses less digits than its factorization.

391741272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5204 (or 5185 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 391741272 is about 19792.4549260571. The cubic root of 391741272 is about 731.7000921374.

The spelling of 391741272 in words is "three hundred ninety-one million, seven hundred forty-one thousand, two hundred seventy-two".