1620328 has 16 divisors (see below), whose sum is σ = 3084480. Its totient is φ = 797808.

The previous prime is 1620319. The next prime is 1620329. The reversal of 1620328 is 8230261.

It is a junction number, because it is equal to n+sod(n) for n = 1620299 and 1620308.

It is not an unprimeable number, because it can be changed into a prime (1620329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 976 + ... + 2047.

It is an arithmetic number, because the mean of its divisors is an integer number (192780).

2^1620328 is an apocalyptic number.

It is an amenable number.

1620328 is a deficient number, since it is larger than the sum of its proper divisors (1464152).

1620328 is a wasteful number, since it uses less digits than its factorization.

1620328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3096 (or 3092 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1620328 is about 1272.9210501834. The cubic root of 1620328 is about 117.4539550989.

Adding to 1620328 its reverse (8230261), we get a palindrome (9850589).

The spelling of 1620328 in words is "one million, six hundred twenty thousand, three hundred twenty-eight".