28597390 has 16 divisors (see below), whose sum is σ = 51671520. Its totient is φ = 11395360.

The previous prime is 28597381. The next prime is 28597397. The reversal of 28597390 is 9379582.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28597397) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2626 + ... + 8005.

It is an arithmetic number, because the mean of its divisors is an integer number (3229470).

Almost surely, 2^28597390 is an apocalyptic number.

28597390 is a deficient number, since it is larger than the sum of its proper divisors (23074130).

28597390 is a wasteful number, since it uses less digits than its factorization.

28597390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10907.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 28597390 is about 5347.6527561165. The cubic root of 28597390 is about 305.8032753801.

The spelling of 28597390 in words is "twenty-eight million, five hundred ninety-seven thousand, three hundred ninety".