40690447 has 6 divisors (see below), whose sum is σ = 46522664. Its totient is φ = 34863060.

The previous prime is 40690439. The next prime is 40690483. The reversal of 40690447 is 74409604.

It is not a de Polignac number, because 40690447 - 2³ = 40690439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40690487) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15672 + ... + 18082.

Almost surely, 2^40690447 is an apocalyptic number.

40690447 is a deficient number, since it is larger than the sum of its proper divisors (5832217).

40690447 is an frugal number, since it uses more digits than its factorization.

40690447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4829 (or 2418 counting only the distinct ones).

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

The square root of 40690447 is about 6378.9064109767. The cubic root of 40690447 is about 343.9517210730.

The spelling of 40690447 in words is "forty million, six hundred ninety thousand, four hundred forty-seven".