28313477 has 4 divisors (see below), whose sum is σ = 29803680.
Its totient is φ = 26823276.
The previous prime is 28313443. The next prime is 28313503. The reversal of 28313477 is 77431382.
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 28313477 - 26 = 28313413 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 (28313977) 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, 745073 + ... + 745110.
It is an arithmetic number, because the mean of its divisors is an integer number (7450920).
Almost surely, 228313477 is an apocalyptic number.
It is an amenable number.
28313477 is a deficient number, since it is larger than the sum of its proper divisors (1490203).
28313477 is a wasteful number, since it uses less digits than its factorization.
28313477 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1490202.
The product of its digits is 28224, while the sum is 35.
The square root of 28313477 is about 5321.0409695848.
The cubic root of 28313477 is about 304.7879095249.
The spelling of 28313477 in words is "twenty-eight million, three hundred thirteen thousand, four hundred seventy-seven".