78826465 has 8 divisors (see below), whose sum is σ = 97148520. Its totient is φ = 61356672.

The previous prime is 78826453. The next prime is 78826481. The reversal of 78826465 is 56462887.

It can be written as a sum of positive squares in 4 ways, for example, as 18593344 + 60233121 = 4312^2 + 7761^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 78826465 - 2⁷ = 78826337 is a prime.

It is a super-2 number, since 2×78826465² = 12427223168792450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212860 + ... + 213229.

It is an arithmetic number, because the mean of its divisors is an integer number (12143565).

Almost surely, 2^78826465 is an apocalyptic number.

It is an amenable number.

78826465 is a deficient number, since it is larger than the sum of its proper divisors (18322055).

78826465 is a wasteful number, since it uses less digits than its factorization.

78826465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426131.

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

The square root of 78826465 is about 8878.4269440031. The cubic root of 78826465 is about 428.7696305189.

The spelling of 78826465 in words is "seventy-eight million, eight hundred twenty-six thousand, four hundred sixty-five".