16161894 has 96 divisors (see below), whose sum is σ = 43380480. Its totient is φ = 4245696.

The previous prime is 16161869. The next prime is 16161907. The reversal of 16161894 is 49816161.

It is a happy number.

It is a super-2 number, since 2×16161894² = 522413635334472, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 102864 + ... + 103020.

It is an arithmetic number, because the mean of its divisors is an integer number (451880).

Almost surely, 2^16161894 is an apocalyptic number.

16161894 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16161894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21690240).

16161894 is an abundant number, since it is smaller than the sum of its proper divisors (27218586).

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

16161894 is a wasteful number, since it uses less digits than its factorization.

16161894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 231 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 16161894 is about 4020.1858166010. The cubic root of 16161894 is about 252.8312497254.

The spelling of 16161894 in words is "sixteen million, one hundred sixty-one thousand, eight hundred ninety-four".