10391040 has 240 divisors, whose sum is σ = 40216176. Its totient is φ = 2457600.

The previous prime is 10391027. The next prime is 10391041. The reversal of 10391040 is 4019301.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10391041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 253420 + ... + 253460.

Almost surely, 2^10391040 is an apocalyptic number.

10391040 is a gapful number since it is divisible by the number (10) 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 10391040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20108088).

10391040 is an abundant number, since it is smaller than the sum of its proper divisors (29825136).

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

10391040 is a wasteful number, since it uses less digits than its factorization.

10391040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81 (or 62 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 10391040 is about 3223.5136109531. The cubic root of 10391040 is about 218.2158734720.

The spelling of 10391040 in words is "ten million, three hundred ninety-one thousand, forty".