16878540 has 72 divisors (see below), whose sum is σ = 54985392. Its totient is φ = 3857280.

The previous prime is 16878529. The next prime is 16878557. The reversal of 16878540 is 4587861.

It is a super-2 number, since 2×16878540² = 569770225063200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70 + ... + 5810.

It is an arithmetic number, because the mean of its divisors is an integer number (763686).

Almost surely, 2^16878540 is an apocalyptic number.

16878540 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 16878540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27492696).

16878540 is an abundant number, since it is smaller than the sum of its proper divisors (38106852).

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

16878540 is a wasteful number, since it uses less digits than its factorization.

16878540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5767 (or 5758 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 16878540 is about 4108.3500337727. The cubic root of 16878540 is about 256.5143264952.

The spelling of 16878540 in words is "sixteen million, eight hundred seventy-eight thousand, five hundred forty".