10400691 has 12 divisors (see below), whose sum is σ = 16131912. Its totient is φ = 5943168.

The previous prime is 10400681. The next prime is 10400699. The reversal of 10400691 is 19600401.

It is not a de Polignac number, because 10400691 - 2⁵ = 10400659 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (10400699) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35230 + ... + 35523.

It is an arithmetic number, because the mean of its divisors is an integer number (1344326).

Almost surely, 2^10400691 is an apocalyptic number.

10400691 is a deficient number, since it is larger than the sum of its proper divisors (5731221).

10400691 is an equidigital number, since it uses as much as digits as its factorization.

10400691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70770 (or 70763 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 10400691 is about 3225.0102325419. The cubic root of 10400691 is about 218.2834108159.

The spelling of 10400691 in words is "ten million, four hundred thousand, six hundred ninety-one".