16969640 has 32 divisors (see below), whose sum is σ = 39501000. Its totient is φ = 6553344.

The previous prime is 16969637. The next prime is 16969661. The reversal of 16969640 is 4696961.

It can be written as a sum of positive squares in 4 ways, for example, as 11142244 + 5827396 = 3338^2 + 2414^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6155 + ... + 8474.

Almost surely, 2^16969640 is an apocalyptic number.

16969640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16969640 is an abundant number, since it is smaller than the sum of its proper divisors (22531360).

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

16969640 is a wasteful number, since it uses less digits than its factorization.

16969640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14669 (or 14665 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 16969640 is about 4119.4222895935. The cubic root of 16969640 is about 256.9750009749.

The spelling of 16969640 in words is "sixteen million, nine hundred sixty-nine thousand, six hundred forty".