28628626 has 32 divisors (see below), whose sum is σ = 49008960. Its totient is φ = 12446784.

The previous prime is 28628623. The next prime is 28628627. The reversal of 28628626 is 62682682.

It is not an unprimeable number, because it can be changed into a prime (28628623) 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 in 15 ways as a sum of consecutive naturals, for example, 31981 + ... + 32863.

It is an arithmetic number, because the mean of its divisors is an integer number (1531530).

Almost surely, 2^28628626 is an apocalyptic number.

28628626 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28628626 is a deficient number, since it is larger than the sum of its proper divisors (20380334).

28628626 is a wasteful number, since it uses less digits than its factorization.

28628626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970.

The product of its digits is 110592, while the sum is 40.

The square root of 28628626 is about 5350.5724927338. The cubic root of 28628626 is about 305.9145745280.

The spelling of 28628626 in words is "twenty-eight million, six hundred twenty-eight thousand, six hundred twenty-six".