28904734 has 4 divisors (see below), whose sum is σ = 43357104. Its totient is φ = 14452366.

The previous prime is 28904731. The next prime is 28904737. The reversal of 28904734 is 43740982.

It is a happy number.

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 (28904731) and next prime (28904737).

It is a super-2 number, since 2×28904734² = 1670967295221512, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28904693 and 28904702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28904731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7226182 + ... + 7226185.

It is an arithmetic number, because the mean of its divisors is an integer number (10839276).

Almost surely, 2^28904734 is an apocalyptic number.

28904734 is a deficient number, since it is larger than the sum of its proper divisors (14452370).

28904734 is a wasteful number, since it uses less digits than its factorization.

28904734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14452369.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 28904734 is about 5376.3123049168. The cubic root of 28904734 is about 306.8948912848.

The spelling of 28904734 in words is "twenty-eight million, nine hundred four thousand, seven hundred thirty-four".