28648662 has 64 divisors (see below), whose sum is σ = 69894144. Its totient is φ = 7650720.

The previous prime is 28648657. The next prime is 28648699. The reversal of 28648662 is 26684682.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 45087 + ... + 45717.

It is an arithmetic number, because the mean of its divisors is an integer number (1092096).

Almost surely, 2^28648662 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28648662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34947072).

28648662 is an abundant number, since it is smaller than the sum of its proper divisors (41245482).

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

28648662 is a wasteful number, since it uses less digits than its factorization.

28648662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713.

The product of its digits is 221184, while the sum is 42.

The square root of 28648662 is about 5352.4444882689. Note that the first 4 decimals coincide. The cubic root of 28648662 is about 305.9859235697.

The spelling of 28648662 in words is "twenty-eight million, six hundred forty-eight thousand, six hundred sixty-two".