1616428 has 24 divisors (see below), whose sum is σ = 3268944. Its totient is φ = 691200.

The previous prime is 1616401. The next prime is 1616429. The reversal of 1616428 is 8246161.

It is a super-2 number, since 2×1616428² = 5225678958368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1616396 and 1616405.

It is not an unprimeable number, because it can be changed into a prime (1616429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333 + ... + 1828.

It is an arithmetic number, because the mean of its divisors is an integer number (136206).

2^1616428 is an apocalyptic number.

It is an amenable number.

1616428 is an abundant number, since it is smaller than the sum of its proper divisors (1652516).

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

1616428 is a wasteful number, since it uses less digits than its factorization.

1616428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2193 (or 2191 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 1616428 is about 1271.3882176582. The cubic root of 1616428 is about 117.3596452986.

The spelling of 1616428 in words is "one million, six hundred sixteen thousand, four hundred twenty-eight".