10391880 has 32 divisors (see below), whose sum is σ = 31176000. Its totient is φ = 2771136.

The previous prime is 10391873. The next prime is 10391893. The reversal of 10391880 is 8819301.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43180 + ... + 43419.

It is an arithmetic number, because the mean of its divisors is an integer number (974250).

Almost surely, 2^10391880 is an apocalyptic number.

10391880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10391880 is an abundant number, since it is smaller than the sum of its proper divisors (20784120).

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

10391880 is a wasteful number, since it uses less digits than its factorization.

10391880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86613 (or 86609 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 10391880 is about 3223.6439009295. The cubic root of 10391880 is about 218.2217534223.

The spelling of 10391880 in words is "ten million, three hundred ninety-one thousand, eight hundred eighty".