76628109 has 4 divisors (see below), whose sum is σ = 102170816. Its totient is φ = 51085404.

The previous prime is 76628087. The next prime is 76628113. The reversal of 76628109 is 90182667.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 76628109 - 2⁵ = 76628077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76628309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12771349 + ... + 12771354.

It is an arithmetic number, because the mean of its divisors is an integer number (25542704).

Almost surely, 2^76628109 is an apocalyptic number.

It is an amenable number.

76628109 is a deficient number, since it is larger than the sum of its proper divisors (25542707).

76628109 is a wasteful number, since it uses less digits than its factorization.

76628109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25542706.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 76628109 is about 8753.7482828786. The cubic root of 76628109 is about 424.7460702264.

The spelling of 76628109 in words is "seventy-six million, six hundred twenty-eight thousand, one hundred nine".