28154965 has 8 divisors (see below), whose sum is σ = 34699320. Its totient is φ = 21915072.

The previous prime is 28154957. The next prime is 28154993. The reversal of 28154965 is 56945182.

It can be written as a sum of positive squares in 4 ways, for example, as 7279204 + 20875761 = 2698^2 + 4569^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28154965 - 2³ = 28154957 is a prime.

It is a congruent number.

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, 75910 + ... + 76279.

It is an arithmetic number, because the mean of its divisors is an integer number (4337415).

Almost surely, 2^28154965 is an apocalyptic number.

It is an amenable number.

28154965 is a deficient number, since it is larger than the sum of its proper divisors (6544355).

28154965 is a wasteful number, since it uses less digits than its factorization.

28154965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152231.

The product of its digits is 86400, while the sum is 40.

The square root of 28154965 is about 5306.1252341044. The cubic root of 28154965 is about 304.2180633316.

The spelling of 28154965 in words is "twenty-eight million, one hundred fifty-four thousand, nine hundred sixty-five".