28450002 has 32 divisors (see below), whose sum is σ = 67129344. Its totient is φ = 7866000.

The previous prime is 28450001. The next prime is 28450031. The reversal of 28450002 is 20005482.

It is a super-2 number, since 2×28450002² = 1618805227600008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (28450001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9624 + ... + 12227.

It is an arithmetic number, because the mean of its divisors is an integer number (2097792).

Almost surely, 2^28450002 is an apocalyptic number.

28450002 is an abundant number, since it is smaller than the sum of its proper divisors (38679342).

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

28450002 is a wasteful number, since it uses less digits than its factorization.

28450002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21894.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 28450002 is about 5333.8543287195. The cubic root of 28450002 is about 305.2770107185.

Adding to 28450002 its reverse (20005482), we get a palindrome (48455484).

The spelling of 28450002 in words is "twenty-eight million, four hundred fifty thousand, two".