16440147 has 24 divisors (see below), whose sum is σ = 25369344. Its totient is φ = 10234224.

The previous prime is 16440133. The next prime is 16440161. The reversal of 16440147 is 74104461.

16440147 is a `hidden beast` number, since 1 + 644 + 0 + 14 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (16440133) and next prime (16440161).

It is not a de Polignac number, because 16440147 - 2⁴ = 16440131 is a prime.

It is a super-3 number, since 3×16440147³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16440147.

It is not an unprimeable number, because it can be changed into a prime (16440197) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7978 + ... + 9824.

It is an arithmetic number, because the mean of its divisors is an integer number (1057056).

Almost surely, 2^16440147 is an apocalyptic number.

16440147 is a deficient number, since it is larger than the sum of its proper divisors (8929197).

16440147 is a wasteful number, since it uses less digits than its factorization.

16440147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919 (or 1916 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 16440147 is about 4054.6451139403. The cubic root of 16440147 is about 254.2739671051.

The spelling of 16440147 in words is "sixteen million, four hundred forty thousand, one hundred forty-seven".