40447690 has 8 divisors (see below), whose sum is σ = 72805860. Its totient is φ = 16179072.

The previous prime is 40447681. The next prime is 40447703. The reversal of 40447690 is 9674404.

40447690 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 33281361 + 7166329 = 5769^2 + 2677^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×40447690² = 3272031252672200, 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 3 ways as a sum of consecutive naturals, for example, 2022375 + ... + 2022394.

Almost surely, 2^40447690 is an apocalyptic number.

40447690 is a deficient number, since it is larger than the sum of its proper divisors (32358170).

40447690 is a wasteful number, since it uses less digits than its factorization.

40447690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4044776.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 40447690 is about 6359.8498409947. The cubic root of 40447690 is about 343.2663572080.

The spelling of 40447690 in words is "forty million, four hundred forty-seven thousand, six hundred ninety".