28497818 has 8 divisors (see below), whose sum is σ = 42905280. Its totient is φ = 14196060.

The previous prime is 28497811. The next prime is 28497827. The reversal of 28497818 is 81879482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×28497818² = 1624251261522248, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28497811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25748 + ... + 26831.

It is an arithmetic number, because the mean of its divisors is an integer number (5363160).

Almost surely, 2^28497818 is an apocalyptic number.

28497818 is a deficient number, since it is larger than the sum of its proper divisors (14407462).

28497818 is a wasteful number, since it uses less digits than its factorization.

28497818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52852.

The product of its digits is 258048, while the sum is 47.

The square root of 28497818 is about 5338.3347590798. The cubic root of 28497818 is about 305.4479416422.

The spelling of 28497818 in words is "twenty-eight million, four hundred ninety-seven thousand, eight hundred eighteen".