28015061 has 4 divisors (see below), whose sum is σ = 28276992. Its totient is φ = 27753132.

The previous prime is 28015051. The next prime is 28015069. The reversal of 28015061 is 16051082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28015061 - 2¹⁸ = 27752917 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 (28015069) 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, 130805 + ... + 131018.

It is an arithmetic number, because the mean of its divisors is an integer number (7069248).

Almost surely, 2^28015061 is an apocalyptic number.

It is an amenable number.

28015061 is a deficient number, since it is larger than the sum of its proper divisors (261931).

28015061 is a wasteful number, since it uses less digits than its factorization.

28015061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261930.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 28015061 is about 5292.9255615397. The cubic root of 28015061 is about 303.7133327458.

The spelling of 28015061 in words is "twenty-eight million, fifteen thousand, sixty-one".