16978632 has 64 divisors (see below), whose sum is σ = 46992960. Its totient is φ = 5068800.

The previous prime is 16978613. The next prime is 16978639. The reversal of 16978632 is 23687961.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (16978639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18832 + ... + 19712.

It is an arithmetic number, because the mean of its divisors is an integer number (734265).

Almost surely, 2^16978632 is an apocalyptic number.

16978632 is a gapful number since it is divisible by the number (12) 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 16978632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23496480).

16978632 is an abundant number, since it is smaller than the sum of its proper divisors (30014328).

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

16978632 is a wasteful number, since it uses less digits than its factorization.

16978632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974 (or 970 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 16978632 is about 4120.5135602252. The cubic root of 16978632 is about 257.0203822399.

The spelling of 16978632 in words is "sixteen million, nine hundred seventy-eight thousand, six hundred thirty-two".