440672431 has 2 divisors, whose sum is σ = 440672432. Its totient is φ = 440672430.

The previous prime is 440672399. The next prime is 440672459. The reversal of 440672431 is 134276044.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 440672431 - 2⁵ = 440672399 is a prime.

It is a super-2 number, since 2×440672431² = 388384382886899522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 440672393 and 440672402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440672231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220336215 + 220336216.

It is an arithmetic number, because the mean of its divisors is an integer number (220336216).

Almost surely, 2^440672431 is an apocalyptic number.

440672431 is a deficient number, since it is larger than the sum of its proper divisors (1).

440672431 is an equidigital number, since it uses as much as digits as its factorization.

440672431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 440672431 is about 20992.1992892598. The cubic root of 440672431 is about 760.9777529912.

The spelling of 440672431 in words is "four hundred forty million, six hundred seventy-two thousand, four hundred thirty-one".