28900039 has 16 divisors (see below), whose sum is σ = 34203456. Its totient is φ = 23904000.

The previous prime is 28899973. The next prime is 28900057. The reversal of 28900039 is 93000982.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28900039 - 2¹¹ = 28897991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28900139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28489 + ... + 29485.

It is an arithmetic number, because the mean of its divisors is an integer number (2137716).

Almost surely, 2^28900039 is an apocalyptic number.

28900039 is a deficient number, since it is larger than the sum of its proper divisors (5303417).

28900039 is a wasteful number, since it uses less digits than its factorization.

28900039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 28900039 is about 5375.8756496035. The cubic root of 28900039 is about 306.8782740583.

The spelling of 28900039 in words is "twenty-eight million, nine hundred thousand, thirty-nine".