28637793 has 12 divisors (see below), whose sum is σ = 42898128. Its totient is φ = 19091700.

The previous prime is 28637747. The next prime is 28637837. The reversal of 28637793 is 39773682.

It is a happy number.

28637793 is a `hidden beast` number, since 2 + 8 + 637 + 7 + 9 + 3 = 666.

It is not a de Polignac number, because 28637793 - 2⁶ = 28637729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28637723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58683 + ... + 59168.

It is an arithmetic number, because the mean of its divisors is an integer number (3574844).

Almost surely, 2^28637793 is an apocalyptic number.

It is an amenable number.

28637793 is a deficient number, since it is larger than the sum of its proper divisors (14260335).

28637793 is an equidigital number, since it uses as much as digits as its factorization.

28637793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117866 (or 117854 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 28637793 is about 5351.4290614751. The cubic root of 28637793 is about 305.9472227317.

The spelling of 28637793 in words is "twenty-eight million, six hundred thirty-seven thousand, seven hundred ninety-three".