28140677 has 4 divisors (see below), whose sum is σ = 28201920. Its totient is φ = 28079436.

The previous prime is 28140647. The next prime is 28140709. The reversal of 28140677 is 77604182.

It is a happy number.

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 not a de Polignac number, because 28140677 - 2¹⁴ = 28124293 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 (28140647) 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, 29927 + ... + 30852.

It is an arithmetic number, because the mean of its divisors is an integer number (7050480).

Almost surely, 2^28140677 is an apocalyptic number.

It is an amenable number.

28140677 is a deficient number, since it is larger than the sum of its proper divisors (61243).

28140677 is an equidigital number, since it uses as much as digits as its factorization.

28140677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61242.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 28140677 is about 5304.7786947242. The cubic root of 28140677 is about 304.1665933904.

The spelling of 28140677 in words is "twenty-eight million, one hundred forty thousand, six hundred seventy-seven".