28497430 has 32 divisors (see below), whose sum is σ = 57153600. Its totient is φ = 10157952.

The previous prime is 28497421. The next prime is 28497451. The reversal of 28497430 is 3479482.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28497430.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10 + ... + 7549.

It is an arithmetic number, because the mean of its divisors is an integer number (1786050).

Almost surely, 2^28497430 is an apocalyptic number.

28497430 is an abundant number, since it is smaller than the sum of its proper divisors (28656170).

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

28497430 is a wasteful number, since it uses less digits than its factorization.

28497430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7608.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 28497430 is about 5338.2984180355. The cubic root of 28497430 is about 305.4465554035.

The spelling of 28497430 in words is "twenty-eight million, four hundred ninety-seven thousand, four hundred thirty".