28033634 has 4 divisors (see below), whose sum is σ = 42050454. Its totient is φ = 14016816.

The previous prime is 28033631. The next prime is 28033637. The reversal of 28033634 is 43633082.

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

It is an interprime number because it is at equal distance from previous prime (28033631) and next prime (28033637).

It can be written as a sum of positive squares in only one way, i.e., 27615025 + 418609 = 5255^2 + 647^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28033597 and 28033606.

It is not an unprimeable number, because it can be changed into a prime (28033631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7008407 + ... + 7008410.

Almost surely, 2^28033634 is an apocalyptic number.

28033634 is a deficient number, since it is larger than the sum of its proper divisors (14016820).

28033634 is a wasteful number, since it uses less digits than its factorization.

28033634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14016819.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 28033634 is about 5294.6797825742. The cubic root of 28033634 is about 303.7804350047.

The spelling of 28033634 in words is "twenty-eight million, thirty-three thousand, six hundred thirty-four".