28215154 has 8 divisors (see below), whose sum is σ = 46170288. Its totient is φ = 12825060.

The previous prime is 28215149. The next prime is 28215163. The reversal of 28215154 is 45151282.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 641232 + ... + 641275.

It is an arithmetic number, because the mean of its divisors is an integer number (5771286).

Almost surely, 2^28215154 is an apocalyptic number.

28215154 is a deficient number, since it is larger than the sum of its proper divisors (17955134).

28215154 is a wasteful number, since it uses less digits than its factorization.

28215154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282520.

The product of its digits is 3200, while the sum is 28.

The square root of 28215154 is about 5311.7938589520. The cubic root of 28215154 is about 304.4346923645.

The spelling of 28215154 in words is "twenty-eight million, two hundred fifteen thousand, one hundred fifty-four".