440191157 has 6 divisors (see below), whose sum is σ = 512059158. Its totient is φ = 377306664.

The previous prime is 440191151. The next prime is 440191163. The reversal of 440191157 is 751191044.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (440191151) and next prime (440191163).

It can be written as a sum of positive squares in only one way, i.e., 422960356 + 17230801 = 20566^2 + 4151^2 .

It is not a de Polignac number, because 440191157 - 2⁸ = 440190901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440191151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4491698 + ... + 4491795.

It is an arithmetic number, because the mean of its divisors is an integer number (85343193).

Almost surely, 2^440191157 is an apocalyptic number.

It is an amenable number.

440191157 is a deficient number, since it is larger than the sum of its proper divisors (71868001).

440191157 is an equidigital number, since it uses as much as digits as its factorization.

440191157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8983507 (or 8983500 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 440191157 is about 20980.7329948217. The cubic root of 440191157 is about 760.7006218089.

The spelling of 440191157 in words is "four hundred forty million, one hundred ninety-one thousand, one hundred fifty-seven".