28744061 has 4 divisors (see below), whose sum is σ = 28765632. Its totient is φ = 28722492.

The previous prime is 28744057. The next prime is 28744087. The reversal of 28744061 is 16044782.

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 28744061 - 2² = 28744057 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 (28744361) 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, 8645 + ... + 11498.

It is an arithmetic number, because the mean of its divisors is an integer number (7191408).

Almost surely, 2^28744061 is an apocalyptic number.

It is an amenable number.

28744061 is a deficient number, since it is larger than the sum of its proper divisors (21571).

28744061 is a wasteful number, since it uses less digits than its factorization.

28744061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21570.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 28744061 is about 5361.3488041723. The cubic root of 28744061 is about 306.3251879252.

The spelling of 28744061 in words is "twenty-eight million, seven hundred forty-four thousand, sixty-one".