78628903 has 8 divisors (see below), whose sum is σ = 79557408. Its totient is φ = 77704704.

The previous prime is 78628877. The next prime is 78628909. The reversal of 78628903 is 30982687.

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 78628903 - 2²¹ = 76531751 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 78628903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78628909) 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, 48126 + ... + 49732.

It is an arithmetic number, because the mean of its divisors is an integer number (9944676).

Almost surely, 2^78628903 is an apocalyptic number.

78628903 is a deficient number, since it is larger than the sum of its proper divisors (928505).

78628903 is a wasteful number, since it uses less digits than its factorization.

78628903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2153.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 78628903 is about 8867.2940066291. The cubic root of 78628903 is about 428.4111237977.

The spelling of 78628903 in words is "seventy-eight million, six hundred twenty-eight thousand, nine hundred three".