42906399 has 8 divisors (see below), whose sum is σ = 59181360. Its totient is φ = 27617856.

The previous prime is 42906379. The next prime is 42906443. The reversal of 42906399 is 99360924.

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

It is not a de Polignac number, because 42906399 - 2⁷ = 42906271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42906399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42906319) 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, 246502 + ... + 246675.

It is an arithmetic number, because the mean of its divisors is an integer number (7397670).

Almost surely, 2^42906399 is an apocalyptic number.

42906399 is a deficient number, since it is larger than the sum of its proper divisors (16274961).

42906399 is a wasteful number, since it uses less digits than its factorization.

42906399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493209.

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 42906399 is about 6550.2976268258. The cubic root of 42906399 is about 350.0854186074.

The spelling of 42906399 in words is "forty-two million, nine hundred six thousand, three hundred ninety-nine".