1620948 has 48 divisors (see below), whose sum is σ = 4515840. Its totient is φ = 442464.

The previous prime is 1620929. The next prime is 1620961. The reversal of 1620948 is 8490261.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1513 + ... + 2351.

It is an arithmetic number, because the mean of its divisors is an integer number (94080).

2^1620948 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1620948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2257920).

1620948 is an abundant number, since it is smaller than the sum of its proper divisors (2894892).

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

1620948 is a wasteful number, since it uses less digits than its factorization.

1620948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876 (or 874 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1620948 is about 1273.1645612410. The cubic root of 1620948 is about 117.4689339933.

The spelling of 1620948 in words is "one million, six hundred twenty thousand, nine hundred forty-eight".