391230420 has 96 divisors (see below), whose sum is σ = 1270714368. Its totient is φ = 88083072.

The previous prime is 391230419. The next prime is 391230431. The reversal of 391230420 is 24032193.

391230420 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×391230420² = 306122483066752800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21189 + ... + 35091.

It is an arithmetic number, because the mean of its divisors is an integer number (13236608).

Almost surely, 2^391230420 is an apocalyptic number.

391230420 is a gapful number since it is divisible by the number (30) 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 391230420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (635357184).

391230420 is an abundant number, since it is smaller than the sum of its proper divisors (879483948).

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

391230420 is a wasteful number, since it uses less digits than its factorization.

391230420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13989 (or 13987 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 391230420 is about 19779.5454952838. The cubic root of 391230420 is about 731.3818948296.

The spelling of 391230420 in words is "three hundred ninety-one million, two hundred thirty thousand, four hundred twenty".