40622781 has 16 divisors (see below), whose sum is σ = 55814400. Its totient is φ = 26261568.

The previous prime is 40622749. The next prime is 40622789. The reversal of 40622781 is 18722604.

40622781 = T₃₁₈ + T₃₁₉ + ... + T₆₅₀.

It is not a de Polignac number, because 40622781 - 2⁵ = 40622749 is a prime.

It is a super-2 number, since 2×40622781² = 3300420672347922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40622789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56140 + ... + 56858.

It is an arithmetic number, because the mean of its divisors is an integer number (3488400).

Almost surely, 2^40622781 is an apocalyptic number.

It is an amenable number.

40622781 is a deficient number, since it is larger than the sum of its proper divisors (15191619).

40622781 is a wasteful number, since it uses less digits than its factorization.

40622781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 40622781 is about 6373.6003169323. The cubic root of 40622781 is about 343.7609576232.

The spelling of 40622781 in words is "forty million, six hundred twenty-two thousand, seven hundred eighty-one".