28621626 has 16 divisors (see below), whose sum is σ = 62447328. Its totient is φ = 8673200.

The previous prime is 28621603. The next prime is 28621631. The reversal of 28621626 is 62612682.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216765 + ... + 216896.

It is an arithmetic number, because the mean of its divisors is an integer number (3902958).

Almost surely, 2^28621626 is an apocalyptic number.

28621626 is an abundant number, since it is smaller than the sum of its proper divisors (33825702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28621626 is a wasteful number, since it uses less digits than its factorization.

28621626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433677.

The product of its digits is 13824, while the sum is 33.

The square root of 28621626 is about 5349.9183171334. The cubic root of 28621626 is about 305.8896393858.

It can be divided in two parts, 286 and 21626, that added together give a palindrome (21912).

The spelling of 28621626 in words is "twenty-eight million, six hundred twenty-one thousand, six hundred twenty-six".