391150122 has 64 divisors (see below), whose sum is σ = 869446656. Its totient is φ = 116328960.

The previous prime is 391150079. The next prime is 391150129. The reversal of 391150122 is 221051193.

It is a super-2 number, since 2×391150122² = 305996835881229768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 391150092 and 391150101.

It is not an unprimeable number, because it can be changed into a prime (391150129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1107898 + ... + 1108250.

It is an arithmetic number, because the mean of its divisors is an integer number (13585104).

Almost surely, 2^391150122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 391150122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (434723328).

391150122 is an abundant number, since it is smaller than the sum of its proper divisors (478296534).

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

391150122 is a wasteful number, since it uses less digits than its factorization.

391150122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 391150122 is about 19777.5155669260. The cubic root of 391150122 is about 731.3318539681.

The spelling of 391150122 in words is "three hundred ninety-one million, one hundred fifty thousand, one hundred twenty-two".