28911315 has 8 divisors (see below), whose sum is σ = 46258128. Its totient is φ = 15419360.

The previous prime is 28911301. The next prime is 28911329. The reversal of 28911315 is 51311982.

It is an interprime number because it is at equal distance from previous prime (28911301) and next prime (28911329).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28911315 - 2⁵ = 28911283 is a prime.

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, 963696 + ... + 963725.

It is an arithmetic number, because the mean of its divisors is an integer number (5782266).

Almost surely, 2^28911315 is an apocalyptic number.

28911315 is a deficient number, since it is larger than the sum of its proper divisors (17346813).

28911315 is a wasteful number, since it uses less digits than its factorization.

28911315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927429.

The product of its digits is 2160, while the sum is 30.

The square root of 28911315 is about 5376.9243067017. The cubic root of 28911315 is about 306.9181806881.

The spelling of 28911315 in words is "twenty-eight million, nine hundred eleven thousand, three hundred fifteen".