865440470 has 16 divisors (see below), whose sum is σ = 1564003728. Its totient is φ = 344796000.

The previous prime is 865440449. The next prime is 865440479. The reversal of 865440470 is 74044568.

It is a super-2 number, since 2×865440470² = 1497974414227641800, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865440479) 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, 169889 + ... + 174908.

It is an arithmetic number, because the mean of its divisors is an integer number (97750233).

Almost surely, 2^865440470 is an apocalyptic number.

865440470 is a deficient number, since it is larger than the sum of its proper divisors (698563258).

865440470 is a wasteful number, since it uses less digits than its factorization.

865440470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345055.

The product of its (nonzero) digits is 107520, while the sum is 38.

The square root of 865440470 is about 29418.3696013222. The cubic root of 865440470 is about 952.9696436853.

The spelling of 865440470 in words is "eight hundred sixty-five million, four hundred forty thousand, four hundred seventy".