28921060 has 48 divisors (see below), whose sum is σ = 69882624. Its totient is φ = 9848448.

The previous prime is 28921037. The next prime is 28921073. The reversal of 28921060 is 6012982.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

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 15 ways as a sum of consecutive naturals, for example, 22762 + ... + 23998.

It is an arithmetic number, because the mean of its divisors is an integer number (1455888).

Almost surely, 2^28921060 is an apocalyptic number.

28921060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28921060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34941312).

28921060 is an abundant number, since it is smaller than the sum of its proper divisors (40961564).

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

28921060 is a wasteful number, since it uses less digits than its factorization.

28921060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1420 (or 1418 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 28921060 is about 5377.8304175569. The cubic root of 28921060 is about 306.9526606335.

The spelling of 28921060 in words is "twenty-eight million, nine hundred twenty-one thousand, sixty".