42109390 has 32 divisors (see below), whose sum is σ = 77635584. Its totient is φ = 16440480.

The previous prime is 42109381. The next prime is 42109409. The reversal of 42109390 is 9390124.

It is a happy 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 15 ways as a sum of consecutive naturals, for example, 89937 + ... + 90403.

It is an arithmetic number, because the mean of its divisors is an integer number (2426112).

Almost surely, 2^42109390 is an apocalyptic number.

42109390 is a deficient number, since it is larger than the sum of its proper divisors (35526194).

42109390 is a wasteful number, since it uses less digits than its factorization.

42109390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 42109390 is about 6489.1748319798. The cubic root of 42109390 is about 347.9041826748.

The spelling of 42109390 in words is "forty-two million, one hundred nine thousand, three hundred ninety".