36728557 has 4 divisors (see below), whose sum is σ = 36802080. Its totient is φ = 36655036.

The previous prime is 36728537. The next prime is 36728567. The reversal of 36728557 is 75582763.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36728557 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 (36728537) 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, 36007 + ... + 37012.

It is an arithmetic number, because the mean of its divisors is an integer number (9200520).

Almost surely, 2^36728557 is an apocalyptic number.

It is an amenable number.

36728557 is a deficient number, since it is larger than the sum of its proper divisors (73523).

36728557 is an equidigital number, since it uses as much as digits as its factorization.

36728557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73522.

The product of its digits is 352800, while the sum is 43.

The square root of 36728557 is about 6060.4089795987. The cubic root of 36728557 is about 332.4053119489.

The spelling of 36728557 in words is "thirty-six million, seven hundred twenty-eight thousand, five hundred fifty-seven".