16528401 has 16 divisors (see below), whose sum is σ = 24678720. Its totient is φ = 10932480.

The previous prime is 16528399. The next prime is 16528427. The reversal of 16528401 is 10482561.

16528401 is a `hidden beast` number, since 1 + 652 + 8 + 4 + 0 + 1 = 666.

It is not a de Polignac number, because 16528401 - 2¹ = 16528399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (16528481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1201 + ... + 5873.

It is an arithmetic number, because the mean of its divisors is an integer number (1542420).

Almost surely, 2^16528401 is an apocalyptic number.

It is an amenable number.

16528401 is a deficient number, since it is larger than the sum of its proper divisors (8150319).

16528401 is a wasteful number, since it uses less digits than its factorization.

16528401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4813 (or 4807 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 16528401 is about 4065.5136206880. The cubic root of 16528401 is about 254.7281532030.

The spelling of 16528401 in words is "sixteen million, five hundred twenty-eight thousand, four hundred one".