28345064 has 48 divisors (see below), whose sum is σ = 60203520. Its totient is φ = 12407360.

The previous prime is 28345061. The next prime is 28345091. The reversal of 28345064 is 46054382.

28345064 = T₁₇₇ + T₁₇₈ + ... + T₅₅₉.

It is a self number, because there is not a number n which added to its sum of digits gives 28345064.

It is not an unprimeable number, because it can be changed into a prime (28345061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73817 + ... + 74199.

It is an arithmetic number, because the mean of its divisors is an integer number (1254240).

Almost surely, 2^28345064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28345064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30101760).

28345064 is an abundant number, since it is smaller than the sum of its proper divisors (31858456).

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

28345064 is a wasteful number, since it uses less digits than its factorization.

28345064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 28345064 is about 5324.0082644564. The cubic root of 28345064 is about 304.9012096067.

The spelling of 28345064 in words is "twenty-eight million, three hundred forty-five thousand, sixty-four".