391228107 has 8 divisors (see below), whose sum is σ = 549092160. Its totient is φ = 247091400.

The previous prime is 391228087. The next prime is 391228127. The reversal of 391228107 is 701822193.

It is an interprime number because it is at equal distance from previous prime (391228087) and next prime (391228127).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 391228107 - 2⁶ = 391228043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (391228127) 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, 3431769 + ... + 3431882.

It is an arithmetic number, because the mean of its divisors is an integer number (68636520).

Almost surely, 2^391228107 is an apocalyptic number.

391228107 is a deficient number, since it is larger than the sum of its proper divisors (157864053).

391228107 is a wasteful number, since it uses less digits than its factorization.

391228107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6863673.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 391228107 is about 19779.4870257042. The cubic root of 391228107 is about 731.3804534883.

The spelling of 391228107 in words is "three hundred ninety-one million, two hundred twenty-eight thousand, one hundred seven".