78628611 has 8 divisors (see below), whose sum is σ = 107395344. Its totient is φ = 51140480.

The previous prime is 78628579. The next prime is 78628619. The reversal of 78628611 is 11682687.

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 78628611 - 2⁵ = 78628579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78628611.

It is not an unprimeable number, because it can be changed into a prime (78628619) 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, 319506 + ... + 319751.

It is an arithmetic number, because the mean of its divisors is an integer number (13424418).

Almost surely, 2^78628611 is an apocalyptic number.

78628611 is a deficient number, since it is larger than the sum of its proper divisors (28766733).

78628611 is a wasteful number, since it uses less digits than its factorization.

78628611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639301.

The product of its digits is 32256, while the sum is 39.

The square root of 78628611 is about 8867.2775416133. The cubic root of 78628611 is about 428.4105934744.

The spelling of 78628611 in words is "seventy-eight million, six hundred twenty-eight thousand, six hundred eleven".