28640010 has 48 divisors (see below), whose sum is σ = 79962336. Its totient is φ = 6545952.

The previous prime is 28639993. The next prime is 28640033. The reversal of 28640010 is 1004682.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8272 + ... + 11211.

It is an arithmetic number, because the mean of its divisors is an integer number (1665882).

Almost surely, 2^28640010 is an apocalyptic number.

28640010 is an abundant number, since it is smaller than the sum of its proper divisors (51322326).

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

28640010 is a wasteful number, since it uses less digits than its factorization.

28640010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19507 (or 19500 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 28640010 is about 5351.6361983976. The cubic root of 28640010 is about 305.9551175148.

Adding to 28640010 its reverse (1004682), we get a palindrome (29644692).

The spelling of 28640010 in words is "twenty-eight million, six hundred forty thousand, ten".