16247428 has 6 divisors (see below), whose sum is σ = 28433006. Its totient is φ = 8123712.

The previous prime is 16247423. The next prime is 16247437. The reversal of 16247428 is 82474261.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15936064 + 311364 = 3992^2 + 558^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16247393 and 16247402.

It is not an unprimeable number, because it can be changed into a prime (16247423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2030925 + ... + 2030932.

Almost surely, 2^16247428 is an apocalyptic number.

It is an amenable number.

16247428 is a deficient number, since it is larger than the sum of its proper divisors (12185578).

16247428 is a wasteful number, since it uses less digits than its factorization.

16247428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4061861 (or 4061859 counting only the distinct ones).

The product of its digits is 21504, while the sum is 34.

The square root of 16247428 is about 4030.8098441876. The cubic root of 16247428 is about 253.2764869372.

The spelling of 16247428 in words is "sixteen million, two hundred forty-seven thousand, four hundred twenty-eight".