77728026 has 16 divisors (see below), whose sum is σ = 155542464. Its totient is φ = 25894944.

The previous prime is 77728019. The next prime is 77728073. The reversal of 77728026 is 62082777.

It is a Curzon number.

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, 19326 + ... + 22998.

It is an arithmetic number, because the mean of its divisors is an integer number (9721404).

Almost surely, 2^77728026 is an apocalyptic number.

77728026 is an abundant number, since it is smaller than the sum of its proper divisors (77814438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77728026 is a wasteful number, since it uses less digits than its factorization.

77728026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7205.

The product of its (nonzero) digits is 65856, while the sum is 39.

The square root of 77728026 is about 8816.3499249973. The cubic root of 77728026 is about 426.7686864061.

The spelling of 77728026 in words is "seventy-seven million, seven hundred twenty-eight thousand, twenty-six".