40783381 has 4 divisors (see below), whose sum is σ = 40817952. Its totient is φ = 40748812.

The previous prime is 40783363. The next prime is 40783399. The reversal of 40783381 is 18338704.

40783381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (40783363) and next prime (40783399).

It is a cyclic number.

It is not a de Polignac number, because 40783381 - 2⁵ = 40783349 is a prime.

It is a super-2 number, since 2×40783381² = 3326568331582322, 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 (40783081) 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 3 ways as a sum of consecutive naturals, for example, 15451 + ... + 17896.

It is an arithmetic number, because the mean of its divisors is an integer number (10204488).

Almost surely, 2^40783381 is an apocalyptic number.

It is an amenable number.

40783381 is a deficient number, since it is larger than the sum of its proper divisors (34571).

40783381 is a wasteful number, since it uses less digits than its factorization.

40783381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34570.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 40783381 is about 6386.1867338812. The cubic root of 40783381 is about 344.2133754852.

The spelling of 40783381 in words is "forty million, seven hundred eighty-three thousand, three hundred eighty-one".