28751290 has 16 divisors (see below), whose sum is σ = 52630560. Its totient is φ = 11305360.

The previous prime is 28751287. The next prime is 28751293. The reversal of 28751290 is 9215782.

It is an interprime number because it is at equal distance from previous prime (28751287) and next prime (28751293).

It is not an unprimeable number, because it can be changed into a prime (28751293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23776 + ... + 24955.

It is an arithmetic number, because the mean of its divisors is an integer number (3289410).

Almost surely, 2^28751290 is an apocalyptic number.

28751290 is a deficient number, since it is larger than the sum of its proper divisors (23879270).

28751290 is a wasteful number, since it uses less digits than its factorization.

28751290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48797.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 28751290 is about 5362.0229391527. The cubic root of 28751290 is about 306.3508655677.

The spelling of 28751290 in words is "twenty-eight million, seven hundred fifty-one thousand, two hundred ninety".