42947390 has 16 divisors (see below), whose sum is σ = 77771232. Its totient is φ = 17075424.

The previous prime is 42947381. The next prime is 42947407. The reversal of 42947390 is 9374924.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11189 + ... + 14528.

It is an arithmetic number, because the mean of its divisors is an integer number (4860702).

Almost surely, 2^42947390 is an apocalyptic number.

42947390 is a deficient number, since it is larger than the sum of its proper divisors (34823842).

42947390 is a wasteful number, since it uses less digits than its factorization.

42947390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25891.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 42947390 is about 6553.4258216600. The cubic root of 42947390 is about 350.1968688358.

The spelling of 42947390 in words is "forty-two million, nine hundred forty-seven thousand, three hundred ninety".