40046381 has 8 divisors (see below), whose sum is σ = 42807744. Its totient is φ = 37370080.

The previous prime is 40046359. The next prime is 40046387. The reversal of 40046381 is 18364004.

40046381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40046381 is a prime.

It is a super-2 number, since 2×40046381² = 3207425262394322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40046381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40046387) 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 7 ways as a sum of consecutive naturals, for example, 20291 + ... + 22176.

It is an arithmetic number, because the mean of its divisors is an integer number (5350968).

Almost surely, 2^40046381 is an apocalyptic number.

40046381 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

40046381 is a deficient number, since it is larger than the sum of its proper divisors (2761363).

40046381 is a wasteful number, since it uses less digits than its factorization.

40046381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42531.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 40046381 is about 6328.2209980373. The cubic root of 40046381 is about 342.1273222686.

The spelling of 40046381 in words is "forty million, forty-six thousand, three hundred eighty-one".