28739026 has 4 divisors (see below), whose sum is σ = 43108542. Its totient is φ = 14369512.

The previous prime is 28739021. The next prime is 28739059. The reversal of 28739026 is 62093782.

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

It can be written as a sum of positive squares in only one way, i.e., 28676025 + 63001 = 5355^2 + 251^2 .

It is not an unprimeable number, because it can be changed into a prime (28739021) 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, 7184755 + ... + 7184758.

Almost surely, 2^28739026 is an apocalyptic number.

28739026 is a deficient number, since it is larger than the sum of its proper divisors (14369516).

28739026 is a wasteful number, since it uses less digits than its factorization.

28739026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14369515.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 28739026 is about 5360.8792189341. The cubic root of 28739026 is about 306.3073008982.

The spelling of 28739026 in words is "twenty-eight million, seven hundred thirty-nine thousand, twenty-six".