28149053 has 4 divisors (see below), whose sum is σ = 29119740. Its totient is φ = 27178368.

The previous prime is 28149049. The next prime is 28149061. The reversal of 28149053 is 35094182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23251684 + 4897369 = 4822^2 + 2213^2 .

It is a cyclic number.

It is not a de Polignac number, because 28149053 - 2² = 28149049 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28149073) 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, 485300 + ... + 485357.

It is an arithmetic number, because the mean of its divisors is an integer number (7279935).

Almost surely, 2^28149053 is an apocalyptic number.

It is an amenable number.

28149053 is a deficient number, since it is larger than the sum of its proper divisors (970687).

28149053 is an equidigital number, since it uses as much as digits as its factorization.

28149053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970686.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 28149053 is about 5305.5681128415. The cubic root of 28149053 is about 304.1967685311.

The spelling of 28149053 in words is "twenty-eight million, one hundred forty-nine thousand, fifty-three".