28297470 has 16 divisors (see below), whose sum is σ = 67914000. Its totient is φ = 7545984.

The previous prime is 28297463. The next prime is 28297559. The reversal of 28297470 is 7479282.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471595 + ... + 471654.

It is an arithmetic number, because the mean of its divisors is an integer number (4244625).

Almost surely, 2^28297470 is an apocalyptic number.

28297470 is an abundant number, since it is smaller than the sum of its proper divisors (39616530).

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

28297470 is a wasteful number, since it uses less digits than its factorization.

28297470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943259.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 28297470 is about 5319.5366339560. The cubic root of 28297470 is about 304.7304615029.

The spelling of 28297470 in words is "twenty-eight million, two hundred ninety-seven thousand, four hundred seventy".