465440639 has 4 divisors (see below), whose sum is σ = 466909224. Its totient is φ = 463972056.

The previous prime is 465440617. The next prime is 465440641. The reversal of 465440639 is 936044564.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-465440639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 465440596 and 465440605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (465440669) 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, 733817 + ... + 734450.

It is an arithmetic number, because the mean of its divisors is an integer number (116727306).

Almost surely, 2^465440639 is an apocalyptic number.

465440639 is a deficient number, since it is larger than the sum of its proper divisors (1468585).

465440639 is a wasteful number, since it uses less digits than its factorization.

465440639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1468584.

The product of its (nonzero) digits is 311040, while the sum is 41.

The square root of 465440639 is about 21574.0733057066. The cubic root of 465440639 is about 774.9757267458.

The spelling of 465440639 in words is "four hundred sixty-five million, four hundred forty thousand, six hundred thirty-nine".