40669965 has 32 divisors (see below), whose sum is σ = 82632960. Its totient is φ = 18591552.

The previous prime is 40669963. The next prime is 40669969. The reversal of 40669965 is 56996604.

It is not a de Polignac number, because 40669965 - 2¹ = 40669963 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 40669965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40669961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20574 + ... + 22463.

It is an arithmetic number, because the mean of its divisors is an integer number (2582280).

Almost surely, 2^40669965 is an apocalyptic number.

40669965 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40669965 is an abundant number, since it is smaller than the sum of its proper divisors (41962995).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40669965 is a wasteful number, since it uses less digits than its factorization.

40669965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43058 (or 43052 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 40669965 is about 6377.3007612939. The cubic root of 40669965 is about 343.8940007149.

The spelling of 40669965 in words is "forty million, six hundred sixty-nine thousand, nine hundred sixty-five".