16401996 has 72 divisors (see below), whose sum is σ = 45221904. Its totient is φ = 4982400.

The previous prime is 16401977. The next prime is 16402003. The reversal of 16401996 is 69910461.

16401996 is a `hidden beast` number, since 1 + 640 + 1 + 9 + 9 + 6 = 666.

16401996 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 16401996.

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, 47095 + ... + 47441.

It is an arithmetic number, because the mean of its divisors is an integer number (628082).

Almost surely, 2^16401996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16401996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22610952).

16401996 is an abundant number, since it is smaller than the sum of its proper divisors (28819908).

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

16401996 is a wasteful number, since it uses less digits than its factorization.

16401996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 16401996 is about 4049.9377772998. The cubic root of 16401996 is about 254.0771254000.

The spelling of 16401996 in words is "sixteen million, four hundred one thousand, nine hundred ninety-six".