16934640 has 80 divisors (see below), whose sum is σ = 53809056. Its totient is φ = 4403200.

The previous prime is 16934639. The next prime is 16934651. The reversal of 16934640 is 4643961.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8980 + ... + 10700.

Almost surely, 2^16934640 is an apocalyptic number.

16934640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16934640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26904528).

16934640 is an abundant number, since it is smaller than the sum of its proper divisors (36874416).

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

16934640 is a wasteful number, since it uses less digits than its factorization.

16934640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778 (or 1772 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 16934640 is about 4115.1719283646. The cubic root of 16934640 is about 256.7982084676.

The spelling of 16934640 in words is "sixteen million, nine hundred thirty-four thousand, six hundred forty".