623440465 has 8 divisors (see below), whose sum is σ = 766375848. Its totient is φ = 486587520.

The previous prime is 623440459. The next prime is 623440481. The reversal of 623440465 is 564044326.

It can be written as a sum of positive squares in 4 ways, for example, as 2085136 + 621355329 = 1444^2 + 24927^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 623440465 - 2²¹ = 621343313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 623440465.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1520382 + ... + 1520791.

It is an arithmetic number, because the mean of its divisors is an integer number (95796981).

Almost surely, 2^623440465 is an apocalyptic number.

It is an amenable number.

623440465 is a deficient number, since it is larger than the sum of its proper divisors (142935383).

623440465 is a wasteful number, since it uses less digits than its factorization.

623440465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3041219.

The product of its (nonzero) digits is 69120, while the sum is 34.

The square root of 623440465 is about 24968.7898184914. The cubic root of 623440465 is about 854.2762430698.

The spelling of 623440465 in words is "six hundred twenty-three million, four hundred forty thousand, four hundred sixty-five".