28312077 has 8 divisors (see below), whose sum is σ = 37859616. Its totient is φ = 18819632.

The previous prime is 28312051. The next prime is 28312079. The reversal of 28312077 is 77021382.

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 28312077 - 2⁸ = 28311821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28312079) 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, 12558 + ... + 14639.

It is an arithmetic number, because the mean of its divisors is an integer number (4732452).

Almost surely, 2^28312077 is an apocalyptic number.

It is an amenable number.

28312077 is a deficient number, since it is larger than the sum of its proper divisors (9547539).

28312077 is a wasteful number, since it uses less digits than its factorization.

28312077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27547.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 28312077 is about 5320.9094147523. The cubic root of 28312077 is about 304.7828858854.

The spelling of 28312077 in words is "twenty-eight million, three hundred twelve thousand, seventy-seven".