16428501 has 12 divisors (see below), whose sum is σ = 24609312. Its totient is φ = 10952172.

The previous prime is 16428499. The next prime is 16428527. The reversal of 16428501 is 10582461.

It is not a de Polignac number, because 16428501 - 2¹ = 16428499 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16428541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33561 + ... + 34046.

It is an arithmetic number, because the mean of its divisors is an integer number (2050776).

Almost surely, 2^16428501 is an apocalyptic number.

It is an amenable number.

16428501 is a deficient number, since it is larger than the sum of its proper divisors (8180811).

16428501 is an frugal number, since it uses more digits than its factorization.

16428501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67622 (or 67610 counting only the distinct ones).

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

The square root of 16428501 is about 4053.2087288962. The cubic root of 16428501 is about 254.2139113943.

The spelling of 16428501 in words is "sixteen million, four hundred twenty-eight thousand, five hundred one".