40981057 has 8 divisors (see below), whose sum is σ = 44539880. Its totient is φ = 37480320.

The previous prime is 40981051. The next prime is 40981069. The reversal of 40981057 is 75018904.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6922161 + 34058896 = 2631^2 + 5836^2 .

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 40981057 - 2³ = 40981049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40981051) 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, 13044 + ... + 15877.

It is an arithmetic number, because the mean of its divisors is an integer number (5567485).

Almost surely, 2^40981057 is an apocalyptic number.

It is an amenable number.

40981057 is a deficient number, since it is larger than the sum of its proper divisors (3558823).

40981057 is a wasteful number, since it uses less digits than its factorization.

40981057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29043.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 40981057 is about 6401.6448667510. The cubic root of 40981057 is about 344.7686105086.

The spelling of 40981057 in words is "forty million, nine hundred eighty-one thousand, fifty-seven".