391898130 has 64 divisors (see below), whose sum is σ = 1036506240. Its totient is φ = 94219776.

The previous prime is 391898113. The next prime is 391898137. The reversal of 391898130 is 31898193.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (391898137) 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, 5086 + ... + 28454.

It is an arithmetic number, because the mean of its divisors is an integer number (16195410).

Almost surely, 2^391898130 is an apocalyptic number.

391898130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 391898130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (518253120).

391898130 is an abundant number, since it is smaller than the sum of its proper divisors (644608110).

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

391898130 is a wasteful number, since it uses less digits than its factorization.

391898130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23435.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 391898130 is about 19796.4171000714. The cubic root of 391898130 is about 731.7977396630.

The spelling of 391898130 in words is "three hundred ninety-one million, eight hundred ninety-eight thousand, one hundred thirty".