391470980 has 12 divisors (see below), whose sum is σ = 822089100. Its totient is φ = 156588384.

The previous prime is 391470979. The next prime is 391470983. The reversal of 391470980 is 89074193.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 47665216 + 343805764 = 6904^2 + 18542^2 .

It is not an unprimeable number, because it can be changed into a prime (391470983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9786755 + ... + 9786794.

It is an arithmetic number, because the mean of its divisors is an integer number (68507425).

Almost surely, 2^391470980 is an apocalyptic number.

It is an amenable number.

391470980 is an abundant number, since it is smaller than the sum of its proper divisors (430618120).

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

391470980 is a wasteful number, since it uses less digits than its factorization.

391470980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19573558 (or 19573556 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 391470980 is about 19785.6255903118. The cubic root of 391470980 is about 731.5317682980.

The spelling of 391470980 in words is "three hundred ninety-one million, four hundred seventy thousand, nine hundred eighty".