16699428 has 18 divisors (see below), whose sum is σ = 42212534. Its totient is φ = 5566464.

The previous prime is 16699427. The next prime is 16699433. The reversal of 16699428 is 82499661.

It is a happy number.

16699428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9474084 + 7225344 = 3078^2 + 2688^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a zygodrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (16699427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 231901 + ... + 231972.

Almost surely, 2^16699428 is an apocalyptic number.

16699428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16699428 is an abundant number, since it is smaller than the sum of its proper divisors (25513106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16699428 is a wasteful number, since it uses less digits than its factorization.

16699428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463883 (or 463878 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 16699428 is about 4086.4933622851. The cubic root of 16699428 is about 255.6037367113.

The spelling of 16699428 in words is "sixteen million, six hundred ninety-nine thousand, four hundred twenty-eight".