40969640 has 32 divisors (see below), whose sum is σ = 93103560. Its totient is φ = 16224000.

The previous prime is 40969639. The next prime is 40969651. The reversal of 40969640 is 4696904.

It can be written as a sum of positive squares in 4 ways, for example, as 36312676 + 4656964 = 6026^2 + 2158^2 .

It is a super-2 number, since 2×40969640² = 3357022803459200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40969594 and 40969603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1031 + ... + 9110.

Almost surely, 2^40969640 is an apocalyptic number.

40969640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40969640 is an abundant number, since it is smaller than the sum of its proper divisors (52133920).

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

40969640 is a wasteful number, since it uses less digits than its factorization.

40969640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10253 (or 10249 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 40969640 is about 6400.7530806929. The cubic root of 40969640 is about 344.7365909276.

The spelling of 40969640 in words is "forty million, nine hundred sixty-nine thousand, six hundred forty".