28291395 has 32 divisors (see below), whose sum is σ = 49639680. Its totient is φ = 13645440.

The previous prime is 28291381. The next prime is 28291429. The reversal of 28291395 is 59319282.

It is not a de Polignac number, because 28291395 - 2⁸ = 28291139 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45396 + ... + 46014.

It is an arithmetic number, because the mean of its divisors is an integer number (1551240).

Almost surely, 2^28291395 is an apocalyptic number.

28291395 is a deficient number, since it is larger than the sum of its proper divisors (21348285).

28291395 is a wasteful number, since it uses less digits than its factorization.

28291395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915.

The product of its digits is 38880, while the sum is 39.

The square root of 28291395 is about 5318.9655949254. The cubic root of 28291395 is about 304.7086530745.

It can be divided in two parts, 2829 and 1395, that added together give a palindrome (4224).

The spelling of 28291395 in words is "twenty-eight million, two hundred ninety-one thousand, three hundred ninety-five".