42726690 has 56 divisors (see below), whose sum is σ = 115328988. Its totient is φ = 11391840.

The previous prime is 42726667. The next prime is 42726727. The reversal of 42726690 is 9662724.

It is a happy number.

42726690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 42341049 + 385641 = 6507^2 + 621^2 .

It is a super-2 number, since 2×42726690² = 3651140076712200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 4360 + ... + 10220.

Almost surely, 2^42726690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42726690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57664494).

42726690 is an abundant number, since it is smaller than the sum of its proper divisors (72602298).

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

42726690 is an equidigital number, since it uses as much as digits as its factorization.

42726690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5886 (or 5871 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 42726690 is about 6536.5656120015. The cubic root of 42726690 is about 349.5959691510.

The spelling of 42726690 in words is "forty-two million, seven hundred twenty-six thousand, six hundred ninety".