28038061 has 4 divisors (see below), whose sum is σ = 28252224. Its totient is φ = 27823900.

The previous prime is 28038029. The next prime is 28038067. The reversal of 28038061 is 16083082.

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 28038061 - 2⁵ = 28038029 is a prime.

It is a super-2 number, since 2×28038061² = 1572265729279442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28038067) 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, 106885 + ... + 107146.

It is an arithmetic number, because the mean of its divisors is an integer number (7063056).

Almost surely, 2^28038061 is an apocalyptic number.

It is an amenable number.

28038061 is a deficient number, since it is larger than the sum of its proper divisors (214163).

28038061 is a wasteful number, since it uses less digits than its factorization.

28038061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214162.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 28038061 is about 5295.0978272361. The cubic root of 28038061 is about 303.7964249069.

The spelling of 28038061 in words is "twenty-eight million, thirty-eight thousand, sixty-one".