28632277 has 8 divisors (see below), whose sum is σ = 29094912. Its totient is φ = 28173600.

The previous prime is 28632271. The next prime is 28632283. The reversal of 28632277 is 77223682.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28632271) and next prime (28632283).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28632277 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 (28632271) 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, 15777 + ... + 17497.

It is an arithmetic number, because the mean of its divisors is an integer number (3636864).

Almost surely, 2^28632277 is an apocalyptic number.

It is an amenable number.

28632277 is a deficient number, since it is larger than the sum of its proper divisors (462635).

28632277 is a wasteful number, since it uses less digits than its factorization.

28632277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979.

The product of its digits is 56448, while the sum is 37.

The square root of 28632277 is about 5350.9136603014. The cubic root of 28632277 is about 305.9275783729.

The spelling of 28632277 in words is "twenty-eight million, six hundred thirty-two thousand, two hundred seventy-seven".