40673581 has 8 divisors (see below), whose sum is σ = 45215744. Its totient is φ = 36333360.

The previous prime is 40673579. The next prime is 40673593. The reversal of 40673581 is 18537604.

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

It is a cyclic number.

It is not a de Polignac number, because 40673581 - 2¹ = 40673579 is a prime.

It is a super-2 number, since 2×40673581² = 3308680382727122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40673531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50061 + ... + 50866.

It is an arithmetic number, because the mean of its divisors is an integer number (5651968).

Almost surely, 2^40673581 is an apocalyptic number.

It is an amenable number.

40673581 is a deficient number, since it is larger than the sum of its proper divisors (4542163).

40673581 is a wasteful number, since it uses less digits than its factorization.

40673581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100971.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 40673581 is about 6377.5842605175. The cubic root of 40673581 is about 343.9041923789.

The spelling of 40673581 in words is "forty million, six hundred seventy-three thousand, five hundred eighty-one".