28010977 has 4 divisors (see below), whose sum is σ = 28539540. Its totient is φ = 27482416.

The previous prime is 28010971. The next prime is 28011023. The reversal of 28010977 is 77901082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23853456 + 4157521 = 4884^2 + 2039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28010977 is a prime.

It is a super-3 number, since 3×28010977³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28010971) 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, 264202 + ... + 264307.

It is an arithmetic number, because the mean of its divisors is an integer number (7134885).

Almost surely, 2^28010977 is an apocalyptic number.

It is an amenable number.

28010977 is a deficient number, since it is larger than the sum of its proper divisors (528563).

28010977 is an equidigital number, since it uses as much as digits as its factorization.

28010977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528562.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 28010977 is about 5292.5397494965. The cubic root of 28010977 is about 303.6985737140.

The spelling of 28010977 in words is "twenty-eight million, ten thousand, nine hundred seventy-seven".