40046981 has 8 divisors (see below), whose sum is σ = 43394400. Its totient is φ = 36737712.

The previous prime is 40046971. The next prime is 40046983. The reversal of 40046981 is 18964004.

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 40046981 - 2¹⁸ = 39784837 is a prime.

It is a super-2 number, since 2×40046981² = 3207521374428722, 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 (40046983) 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, 7331 + ... + 11568.

It is an arithmetic number, because the mean of its divisors is an integer number (5424300).

Almost surely, 2^40046981 is an apocalyptic number.

It is an amenable number.

40046981 is a deficient number, since it is larger than the sum of its proper divisors (3347419).

40046981 is a wasteful number, since it uses less digits than its factorization.

40046981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19075.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 40046981 is about 6328.2684045480. The cubic root of 40046981 is about 342.1290309155.

The spelling of 40046981 in words is "forty million, forty-six thousand, nine hundred eighty-one".