440397019 has 4 divisors (see below), whose sum is σ = 466302744. Its totient is φ = 414491296.

The previous prime is 440396993. The next prime is 440397043. The reversal of 440397019 is 910793044.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 440397019 - 2⁹ = 440396507 is a prime.

It is a super-2 number, since 2×440397019² = 387899068688172722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440397059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12952837 + ... + 12952870.

It is an arithmetic number, because the mean of its divisors is an integer number (116575686).

Almost surely, 2^440397019 is an apocalyptic number.

440397019 is a deficient number, since it is larger than the sum of its proper divisors (25905725).

440397019 is a wasteful number, since it uses less digits than its factorization.

440397019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25905724.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 440397019 is about 20985.6383986764. The cubic root of 440397019 is about 760.8191876813.

The spelling of 440397019 in words is "four hundred forty million, three hundred ninety-seven thousand, nineteen".