28481001 has 16 divisors (see below), whose sum is σ = 40723200. Its totient is φ = 17641728.

The previous prime is 28480999. The next prime is 28481017. The reversal of 28481001 is 10018482.

It is not a de Polignac number, because 28481001 - 2¹ = 28480999 is a prime.

It is a super-2 number, since 2×28481001² = 1622334835924002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28481021) 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, 495 + ... + 7563.

It is an arithmetic number, because the mean of its divisors is an integer number (2545200).

Almost surely, 2^28481001 is an apocalyptic number.

It is an amenable number.

28481001 is a deficient number, since it is larger than the sum of its proper divisors (12242199).

28481001 is a wasteful number, since it uses less digits than its factorization.

28481001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7168.

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 28481001 is about 5336.7594099791. The cubic root of 28481001 is about 305.3878466461.

Adding to 28481001 its reverse (10018482), we get a palindrome (38499483).

The spelling of 28481001 in words is "twenty-eight million, four hundred eighty-one thousand, one".