39028991 has 4 divisors (see below), whose sum is σ = 41324832. Its totient is φ = 36733152.

The previous prime is 39028963. The next prime is 39029009. The reversal of 39028991 is 19982093.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39028991 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 (39028901) 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, 1147895 + ... + 1147928.

It is an arithmetic number, because the mean of its divisors is an integer number (10331208).

Almost surely, 2^39028991 is an apocalyptic number.

39028991 is a deficient number, since it is larger than the sum of its proper divisors (2295841).

39028991 is a wasteful number, since it uses less digits than its factorization.

39028991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2295840.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 39028991 is about 6247.3187048525. The cubic root of 39028991 is about 339.2051530706.

The spelling of 39028991 in words is "thirty-nine million, twenty-eight thousand, nine hundred ninety-one".