28012154 has 8 divisors (see below), whose sum is σ = 42043860. Its totient is φ = 13997536.

The previous prime is 28012147. The next prime is 28012157. The reversal of 28012154 is 45121082.

It can be written as a sum of positive squares in 2 ways, for example, as 21836929 + 6175225 = 4673^2 + 2485^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28012157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1262 + ... + 7590.

Almost surely, 2^28012154 is an apocalyptic number.

28012154 is a deficient number, since it is larger than the sum of its proper divisors (14031706).

28012154 is a wasteful number, since it uses less digits than its factorization.

28012154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8544.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 28012154 is about 5292.6509425807. The cubic root of 28012154 is about 303.7028273823.

The spelling of 28012154 in words is "twenty-eight million, twelve thousand, one hundred fifty-four".