28126290 has 32 divisors (see below), whose sum is σ = 69330240. Its totient is φ = 7297344.

The previous prime is 28126261. The next prime is 28126297. The reversal of 28126290 is 9262182.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (28126297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11560 + ... + 13779.

It is an arithmetic number, because the mean of its divisors is an integer number (2166570).

Almost surely, 2^28126290 is an apocalyptic number.

28126290 is an abundant number, since it is smaller than the sum of its proper divisors (41203950).

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

28126290 is a wasteful number, since it uses less digits than its factorization.

28126290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25386.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 28126290 is about 5303.4224798709. The cubic root of 28126290 is about 304.1147492131.

The spelling of 28126290 in words is "twenty-eight million, one hundred twenty-six thousand, two hundred ninety".