42309790 has 16 divisors (see below), whose sum is σ = 76503168. Its totient is φ = 16847136.

The previous prime is 42309781. The next prime is 42309791. The reversal of 42309790 is 9790324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42309791) 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, 7257 + ... + 11716.

It is an arithmetic number, because the mean of its divisors is an integer number (4781448).

Almost surely, 2^42309790 is an apocalyptic number.

42309790 is a deficient number, since it is larger than the sum of its proper divisors (34193378).

42309790 is a wasteful number, since it uses less digits than its factorization.

42309790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19203.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 42309790 is about 6504.5976047716. The cubic root of 42309790 is about 348.4552053783.

The spelling of 42309790 in words is "forty-two million, three hundred nine thousand, seven hundred ninety".