440406422625 has 64 divisors (see below), whose sum is σ = 796585031424. Its totient is φ = 214788902400.

The previous prime is 440406422557. The next prime is 440406422641. The reversal of 440406422625 is 526224604044.

It is not a de Polignac number, because 440406422625 - 2⁸ = 440406422369 is a prime.

It is a super-2 number, since 2×440406422625² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 99477 + ... + 943773.

It is an arithmetic number, because the mean of its divisors is an integer number (12446641116).

Almost surely, 2^440406422625 is an apocalyptic number.

It is an amenable number.

440406422625 is a deficient number, since it is larger than the sum of its proper divisors (356178608799).

440406422625 is a wasteful number, since it uses less digits than its factorization.

440406422625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844435 (or 844425 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 39.

The spelling of 440406422625 in words is "four hundred forty billion, four hundred six million, four hundred twenty-two thousand, six hundred twenty-five".