28152901 has 12 divisors (see below), whose sum is σ = 34676748. Its totient is φ = 22710912.

The previous prime is 28152863. The next prime is 28152919. The reversal of 28152901 is 10925182.

It can be written as a sum of positive squares in 2 ways, for example, as 16769025 + 11383876 = 4095^2 + 3374^2 .

It is not a de Polignac number, because 28152901 - 2²¹ = 26055749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28152901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28152001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16066 + ... + 17731.

It is an arithmetic number, because the mean of its divisors is an integer number (2889729).

Almost surely, 2^28152901 is an apocalyptic number.

It is an amenable number.

28152901 is a deficient number, since it is larger than the sum of its proper divisors (6523847).

28152901 is a wasteful number, since it uses less digits than its factorization.

28152901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33828 (or 33821 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 28152901 is about 5305.9307383342. The cubic root of 28152901 is about 304.2106292203.

The spelling of 28152901 in words is "twenty-eight million, one hundred fifty-two thousand, nine hundred one".