40528690 has 16 divisors (see below), whose sum is σ = 74923992. Its totient is φ = 15773184.

The previous prime is 40528673. The next prime is 40528699. The reversal of 40528690 is 9682504.

It is a happy number.

40528690 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 4 ways, for example, as 40436881 + 91809 = 6359^2 + 303^2 .

It is a super-2 number, since 2×40528690² = 3285149426232200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40528699) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 54399 + ... + 55138.

Almost surely, 2^40528690 is an apocalyptic number.

40528690 is a deficient number, since it is larger than the sum of its proper divisors (34395302).

40528690 is a wasteful number, since it uses less digits than its factorization.

40528690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109581.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 40528690 is about 6366.2147309056. The cubic root of 40528690 is about 343.4953446170.

The spelling of 40528690 in words is "forty million, five hundred twenty-eight thousand, six hundred ninety".