40247090 has 32 divisors (see below), whose sum is σ = 79104816. Its totient is φ = 14653440.

The previous prime is 40247071. The next prime is 40247093. The reversal of 40247090 is 9074204.

40247090 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 8 ways, for example, as 24078649 + 16168441 = 4907^2 + 4021^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (40247093) 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 15 ways as a sum of consecutive naturals, for example, 7370 + ... + 11610.

Almost surely, 2^40247090 is an apocalyptic number.

40247090 is a deficient number, since it is larger than the sum of its proper divisors (38857726).

40247090 is a wasteful number, since it uses less digits than its factorization.

40247090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4334.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 40247090 is about 6344.0594259512. The cubic root of 40247090 is about 342.6979408860.

The spelling of 40247090 in words is "forty million, two hundred forty-seven thousand, ninety".