28602990 has 128 divisors (see below), whose sum is σ = 85276800. Its totient is φ = 6773760.

The previous prime is 28602979. The next prime is 28602991. The reversal of 28602990 is 9920682.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28602991) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 101650 + ... + 101930.

It is an arithmetic number, because the mean of its divisors is an integer number (666225).

Almost surely, 2^28602990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28602990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42638400).

28602990 is an abundant number, since it is smaller than the sum of its proper divisors (56673810).

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

28602990 is a wasteful number, since it uses less digits than its factorization.

28602990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 333 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 28602990 is about 5348.1763246924. The cubic root of 28602990 is about 305.8232350871.

It can be divided in two parts, 28602 and 990, that added together give a palindrome (29592).

The spelling of 28602990 in words is "twenty-eight million, six hundred two thousand, nine hundred ninety".