40981869 has 10 divisors (see below), whose sum is σ = 61219950. Its totient is φ = 27321192.

The previous prime is 40981819. The next prime is 40981877. The reversal of 40981869 is 96818904.

It can be written as a sum of positive squares in only one way, i.e., 40832100 + 149769 = 6390^2 + 387^2 .

It is not a de Polignac number, because 40981869 - 2¹¹ = 40979821 is a prime.

It is a super-2 number, since 2×40981869² = 3359027173466322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40981819) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 252894 + ... + 253055.

It is an arithmetic number, because the mean of its divisors is an integer number (6121995).

Almost surely, 2^40981869 is an apocalyptic number.

It is an amenable number.

40981869 is a deficient number, since it is larger than the sum of its proper divisors (20238081).

40981869 is an equidigital number, since it uses as much as digits as its factorization.

40981869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505961 (or 505952 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 40981869 is about 6401.7082876370. The cubic root of 40981869 is about 344.7708875790.

The spelling of 40981869 in words is "forty million, nine hundred eighty-one thousand, eight hundred sixty-nine".