28701290 has 16 divisors (see below), whose sum is σ = 51740640. Its totient is φ = 11463120.

The previous prime is 28701269. The next prime is 28701311. The reversal of 28701290 is 9210782.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28701269) and next prime (28701311).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6341 + ... + 9879.

It is an arithmetic number, because the mean of its divisors is an integer number (3233790).

Almost surely, 2^28701290 is an apocalyptic number.

28701290 is a deficient number, since it is larger than the sum of its proper divisors (23039350).

28701290 is a wasteful number, since it uses less digits than its factorization.

28701290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4357.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 28701290 is about 5357.3584908983. The cubic root of 28701290 is about 306.1731757875.

The spelling of 28701290 in words is "twenty-eight million, seven hundred one thousand, two hundred ninety".