42938405 has 8 divisors (see below), whose sum is σ = 51748632. Its totient is φ = 34202368.

The previous prime is 42938393. The next prime is 42938411. The reversal of 42938405 is 50483924.

It can be written as a sum of positive squares in 4 ways, for example, as 1965604 + 40972801 = 1402^2 + 6401^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 42938405 - 2⁸ = 42938149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17264 + ... + 19593.

It is an arithmetic number, because the mean of its divisors is an integer number (6468579).

Almost surely, 2^42938405 is an apocalyptic number.

It is an amenable number.

42938405 is a deficient number, since it is larger than the sum of its proper divisors (8810227).

42938405 is a wasteful number, since it uses less digits than its factorization.

42938405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37095.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 42938405 is about 6552.7402664839. The cubic root of 42938405 is about 350.1724456340.

The spelling of 42938405 in words is "forty-two million, nine hundred thirty-eight thousand, four hundred five".