78268897 has 8 divisors (see below), whose sum is σ = 89770752. Its totient is φ = 66847200.

The previous prime is 78268891. The next prime is 78268903. The reversal of 78268897 is 79886287.

It is an interprime number because it is at equal distance from previous prime (78268891) and next prime (78268903).

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

It is not a de Polignac number, because 78268897 - 2¹⁹ = 77744609 is a prime.

It is a super-2 number, since 2×78268897² = 12252040475193218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78268891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17929 + ... + 21862.

It is an arithmetic number, because the mean of its divisors is an integer number (11221344).

Almost surely, 2^78268897 is an apocalyptic number.

It is an amenable number.

78268897 is a deficient number, since it is larger than the sum of its proper divisors (11501855).

78268897 is a wasteful number, since it uses less digits than its factorization.

78268897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40079.

The product of its digits is 2709504, while the sum is 55.

The square root of 78268897 is about 8846.9710635901. The cubic root of 78268897 is about 427.7562901271.

The spelling of 78268897 in words is "seventy-eight million, two hundred sixty-eight thousand, eight hundred ninety-seven".