1620968 has 8 divisors (see below), whose sum is σ = 3039330. Its totient is φ = 810480.

The previous prime is 1620961. The next prime is 1620973. The reversal of 1620968 is 8690261.

It can be written as a sum of positive squares in only one way, i.e., 850084 + 770884 = 922^2 + 878^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1620961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101303 + ... + 101318.

2^1620968 is an apocalyptic number.

It is an amenable number.

1620968 is a deficient number, since it is larger than the sum of its proper divisors (1418362).

1620968 is a wasteful number, since it uses less digits than its factorization.

1620968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202627 (or 202623 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 1620968 is about 1273.1724156610. The cubic root of 1620968 is about 117.4694171198.

The spelling of 1620968 in words is "one million, six hundred twenty thousand, nine hundred sixty-eight".