28648914 has 64 divisors (see below), whose sum is σ = 68124672. Its totient is φ = 7862400.

The previous prime is 28648901. The next prime is 28648931. The reversal of 28648914 is 41984682.

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

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, 218629 + ... + 218759.

It is an arithmetic number, because the mean of its divisors is an integer number (1064448).

Almost surely, 2^28648914 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28648914, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34062336).

28648914 is an abundant number, since it is smaller than the sum of its proper divisors (39475758).

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

28648914 is a wasteful number, since it uses less digits than its factorization.

28648914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311.

The product of its digits is 110592, while the sum is 42.

The square root of 28648914 is about 5352.4680288629. The cubic root of 28648914 is about 305.9868207404.

The spelling of 28648914 in words is "twenty-eight million, six hundred forty-eight thousand, nine hundred fourteen".