40050981 has 24 divisors (see below), whose sum is σ = 60742656. Its totient is φ = 25380960.

The previous prime is 40050971. The next prime is 40051007. The reversal of 40050981 is 18905004.

It is not a de Polignac number, because 40050981 - 2⁵ = 40050949 is a prime.

It is a super-2 number, since 2×40050981² = 3208162158124722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40050961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39031 + ... + 40043.

It is an arithmetic number, because the mean of its divisors is an integer number (2530944).

Almost surely, 2^40050981 is an apocalyptic number.

It is an amenable number.

40050981 is a deficient number, since it is larger than the sum of its proper divisors (20691675).

40050981 is a wasteful number, since it uses less digits than its factorization.

40050981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233 (or 1230 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 40050981 is about 6328.5844388773. The cubic root of 40050981 is about 342.1404214584.

Adding to 40050981 its reverse (18905004), we get a palindrome (58955985).

The spelling of 40050981 in words is "forty million, fifty thousand, nine hundred eighty-one".