40813965 has 24 divisors (see below), whose sum is σ = 71180928. Its totient is φ = 21633120.

The previous prime is 40813963. The next prime is 40813979. The reversal of 40813965 is 56931804.

It is not a de Polignac number, because 40813965 - 2¹ = 40813963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40813961) 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, 4800 + ... + 10230.

It is an arithmetic number, because the mean of its divisors is an integer number (2965872).

Almost surely, 2^40813965 is an apocalyptic number.

40813965 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40813965 is a deficient number, since it is larger than the sum of its proper divisors (30366963).

40813965 is a wasteful number, since it uses less digits than its factorization.

40813965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5609 (or 5606 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 40813965 is about 6388.5808283217. The cubic root of 40813965 is about 344.2993973824.

The spelling of 40813965 in words is "forty million, eight hundred thirteen thousand, nine hundred sixty-five".