40647969 has 24 divisors (see below), whose sum is σ = 64876032. Its totient is φ = 24393600.

The previous prime is 40647961. The next prime is 40647977. The reversal of 40647969 is 96974604.

It is an interprime number because it is at equal distance from previous prime (40647961) and next prime (40647977).

It is not a de Polignac number, because 40647969 - 2³ = 40647961 is a prime.

It is a super-2 number, since 2×40647969² = 3304514767649922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40647961) 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, 2257 + ... + 9294.

It is an arithmetic number, because the mean of its divisors is an integer number (2703168).

Almost surely, 2^40647969 is an apocalyptic number.

It is an amenable number.

40647969 is a deficient number, since it is larger than the sum of its proper divisors (24228063).

40647969 is a wasteful number, since it uses less digits than its factorization.

40647969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11597 (or 11594 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 40647969 is about 6375.5759739807. The cubic root of 40647969 is about 343.8319921660.

It can be divided in two parts, 40647 and 969, that added together give a triangular number (41616 = T₂₈₈).

The spelling of 40647969 in words is "forty million, six hundred forty-seven thousand, nine hundred sixty-nine".