28632347 has 4 divisors (see below), whose sum is σ = 28646496. Its totient is φ = 28618200.

The previous prime is 28632343. The next prime is 28632371. The reversal of 28632347 is 74323682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74323682 = 2 ⋅37161841.

It is a cyclic number.

It is not a de Polignac number, because 28632347 - 2² = 28632343 is a prime.

It is a super-2 number, since 2×28632347² = 1639622589456818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28632341) 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, 3404 + ... + 8297.

It is an arithmetic number, because the mean of its divisors is an integer number (7161624).

Almost surely, 2^28632347 is an apocalyptic number.

28632347 is a deficient number, since it is larger than the sum of its proper divisors (14149).

28632347 is a wasteful number, since it uses less digits than its factorization.

28632347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14148.

The product of its digits is 48384, while the sum is 35.

The square root of 28632347 is about 5350.9202012364. The cubic root of 28632347 is about 305.9278276826.

The spelling of 28632347 in words is "twenty-eight million, six hundred thirty-two thousand, three hundred forty-seven".