1620316 has 12 divisors (see below), whose sum is σ = 2889432. Its totient is φ = 794768.

The previous prime is 1620271. The next prime is 1620319. The reversal of 1620316 is 6130261.

It is a junction number, because it is equal to n+sod(n) for n = 1620293 and 1620302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3610 + ... + 4033.

It is an arithmetic number, because the mean of its divisors is an integer number (240786).

2^1620316 is an apocalyptic number.

It is an amenable number.

1620316 is a deficient number, since it is larger than the sum of its proper divisors (1269116).

1620316 is a wasteful number, since it uses less digits than its factorization.

1620316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7700 (or 7698 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1620316 is about 1272.9163366066. The cubic root of 1620316 is about 117.4536651471.

Adding to 1620316 its reverse (6130261), we get a palindrome (7750577).

It can be divided in two parts, 1620 and 316, that added together give a square (1936 = 44²).

The spelling of 1620316 in words is "one million, six hundred twenty thousand, three hundred sixteen".