40410981 has 20 divisors (see below), whose sum is σ = 65012332. Its totient is φ = 24867648.

The previous prime is 40410961. The next prime is 40411001. The reversal of 40410981 is 18901404.

It is an interprime number because it is at equal distance from previous prime (40410961) and next prime (40411001).

It can be written as a sum of positive squares in 2 ways, for example, as 1846881 + 38564100 = 1359^2 + 6210^2 .

It is not a de Polignac number, because 40410981 - 2¹¹ = 40408933 is a prime.

It is a super-2 number, since 2×40410981² = 3266094770764722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40410901) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18136 + ... + 20241.

Almost surely, 2^40410981 is an apocalyptic number.

It is an amenable number.

40410981 is a deficient number, since it is larger than the sum of its proper divisors (24601351).

40410981 is a wasteful number, since it uses less digits than its factorization.

40410981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38402 (or 38393 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 40410981 is about 6356.9631900775. The cubic root of 40410981 is about 343.1624800051.

The spelling of 40410981 in words is "forty million, four hundred ten thousand, nine hundred eighty-one".