878620465 has 4 divisors (see below), whose sum is σ = 1054344564. Its totient is φ = 702896368.

The previous prime is 878620459. The next prime is 878620489. The reversal of 878620465 is 564026878.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564026878 = 2 ⋅282013439.

It can be written as a sum of positive squares in 2 ways, for example, as 548871184 + 329749281 = 23428^2 + 18159^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878620465 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87862042 + ... + 87862051.

It is an arithmetic number, because the mean of its divisors is an integer number (263586141).

Almost surely, 2^878620465 is an apocalyptic number.

It is an amenable number.

878620465 is a deficient number, since it is larger than the sum of its proper divisors (175724099).

878620465 is a wasteful number, since it uses less digits than its factorization.

878620465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175724098.

The product of its (nonzero) digits is 645120, while the sum is 46.

The square root of 878620465 is about 29641.5327707593. The cubic root of 878620465 is about 957.7829571375.

The spelling of 878620465 in words is "eight hundred seventy-eight million, six hundred twenty thousand, four hundred sixty-five".