16628001 has 16 divisors (see below), whose sum is σ = 24460800. Its totient is φ = 9982080.

The previous prime is 16627981. The next prime is 16628009. The reversal of 16628001 is 10082661.

It is not a de Polignac number, because 16628001 - 2¹⁰ = 16626977 is a prime.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16628009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3601 + ... + 6798.

It is an arithmetic number, because the mean of its divisors is an integer number (1528800).

Almost surely, 2^16628001 is an apocalyptic number.

It is an amenable number.

16628001 is a deficient number, since it is larger than the sum of its proper divisors (7832799).

16628001 is a wasteful number, since it uses less digits than its factorization.

16628001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10456.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 16628001 is about 4077.7445972008. The cubic root of 16628001 is about 255.2387920790.

The spelling of 16628001 in words is "sixteen million, six hundred twenty-eight thousand, one".