16407946 has 8 divisors (see below), whose sum is σ = 25277220. Its totient is φ = 7982208.

The previous prime is 16407943. The next prime is 16407961. The reversal of 16407946 is 64970461.

It can be written as a sum of positive squares in 2 ways, for example, as 14907321 + 1500625 = 3861^2 + 1225^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (16407943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110791 + ... + 110938.

Almost surely, 2^16407946 is an apocalyptic number.

16407946 is a deficient number, since it is larger than the sum of its proper divisors (8869274).

16407946 is a wasteful number, since it uses less digits than its factorization.

16407946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221768.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 16407946 is about 4050.6722898798. The cubic root of 16407946 is about 254.1078447533.

The spelling of 16407946 in words is "sixteen million, four hundred seven thousand, nine hundred forty-six".