16393946 has 8 divisors (see below), whose sum is σ = 24716340. Its totient is φ = 8155168.

The previous prime is 16393939. The next prime is 16393957. The reversal of 16393946 is 64939361.

It can be written as a sum of positive squares in 2 ways, for example, as 10923025 + 5470921 = 3305^2 + 2339^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×16393946² = 537522930901832, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20411 + ... + 21198.

Almost surely, 2^16393946 is an apocalyptic number.

16393946 is a deficient number, since it is larger than the sum of its proper divisors (8322394).

16393946 is a wasteful number, since it uses less digits than its factorization.

16393946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41808.

The product of its digits is 104976, while the sum is 41.

The square root of 16393946 is about 4048.9438128974. The cubic root of 16393946 is about 254.0355520947.

The spelling of 16393946 in words is "sixteen million, three hundred ninety-three thousand, nine hundred forty-six".