42309690 has 32 divisors (see below), whose sum is σ = 102072960. Its totient is φ = 11223744.

The previous prime is 42309671. The next prime is 42309691. The reversal of 42309690 is 9690324.

It is a super-2 number, since 2×42309690² = 3580219735792200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42309691) by changing a digit.

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, 2331 + ... + 9489.

It is an arithmetic number, because the mean of its divisors is an integer number (3189780).

Almost surely, 2^42309690 is an apocalyptic number.

42309690 is an abundant number, since it is smaller than the sum of its proper divisors (59763270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42309690 is a wasteful number, since it uses less digits than its factorization.

42309690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7366.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 42309690 is about 6504.5899178964. The cubic root of 42309690 is about 348.4549308513.

The spelling of 42309690 in words is "forty-two million, three hundred nine thousand, six hundred ninety".