69440457 has 8 divisors (see below), whose sum is σ = 93542176. Its totient is φ = 45816192.

The previous prime is 69440431. The next prime is 69440491. The reversal of 69440457 is 75404496.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-69440457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69440057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119023 + ... + 119604.

It is an arithmetic number, because the mean of its divisors is an integer number (11692772).

Almost surely, 2^69440457 is an apocalyptic number.

It is an amenable number.

69440457 is a deficient number, since it is larger than the sum of its proper divisors (24101719).

69440457 is a wasteful number, since it uses less digits than its factorization.

69440457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238727.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 69440457 is about 8333.0940832322. The cubic root of 69440457 is about 411.0274784643.

The spelling of 69440457 in words is "sixty-nine million, four hundred forty thousand, four hundred fifty-seven".