42028791 has 8 divisors (see below), whose sum is σ = 64043904. Its totient is φ = 24016440.

The previous prime is 42028787. The next prime is 42028849. The reversal of 42028791 is 19782024.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42028791 - 2² = 42028787 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42028771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1000665 + ... + 1000706.

It is an arithmetic number, because the mean of its divisors is an integer number (8005488).

Almost surely, 2^42028791 is an apocalyptic number.

42028791 is a deficient number, since it is larger than the sum of its proper divisors (22015113).

42028791 is a wasteful number, since it uses less digits than its factorization.

42028791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001381.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 42028791 is about 6482.9615917418. The cubic root of 42028791 is about 347.6820735553.

The spelling of 42028791 in words is "forty-two million, twenty-eight thousand, seven hundred ninety-one".