40625290 has 16 divisors (see below), whose sum is σ = 73211112. Its totient is φ = 16231104.

The previous prime is 40625279. The next prime is 40625293. The reversal of 40625290 is 9252604.

40625290 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 9678321 + 30946969 = 3111^2 + 5563^2 .

It is not an unprimeable number, because it can be changed into a prime (40625293) 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, 9352 + ... + 12988.

Almost surely, 2^40625290 is an apocalyptic number.

40625290 is a deficient number, since it is larger than the sum of its proper divisors (32585822).

40625290 is a wasteful number, since it uses less digits than its factorization.

40625290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4761.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 40625290 is about 6373.7971414221. The cubic root of 40625290 is about 343.7680347563.

Adding to 40625290 its reverse (9252604), we get a palindrome (49877894).

The spelling of 40625290 in words is "forty million, six hundred twenty-five thousand, two hundred ninety".