259413444 has 18 divisors (see below), whose sum is σ = 655739630. Its totient is φ = 86471136.

The previous prime is 259413397. The next prime is 259413491. The reversal of 259413444 is 444314952.

It is an interprime number because it is at equal distance from previous prime (259413397) and next prime (259413491).

It can be written as a sum of positive squares in only one way, i.e., 244296900 + 15116544 = 15630^2 + 3888^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×259413444² = 134590669855882272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 7205929 = 259413444 / (2 + 5 + 9 + 4 + 1 + 3 + 4 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 259413399 and 259413408.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3602929 + ... + 3603000.

Almost surely, 2^259413444 is an apocalyptic number.

It is an amenable number.

259413444 is an abundant number, since it is smaller than the sum of its proper divisors (396326186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

259413444 is a wasteful number, since it uses less digits than its factorization.

259413444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7205939 (or 7205934 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 259413444 is about 16106.3168974164. The cubic root of 259413444 is about 637.7701074545.

The spelling of 259413444 in words is "two hundred fifty-nine million, four hundred thirteen thousand, four hundred forty-four".