1620960 has 96 divisors (see below), whose sum is σ = 5588352. Its totient is φ = 391680.

The previous prime is 1620929. The next prime is 1620961. The reversal of 1620960 is 690261.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1620960² = 5255022643200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1620960.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620961) 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 15 ways as a sum of consecutive naturals, for example, 5127 + ... + 5433.

It is an arithmetic number, because the mean of its divisors is an integer number (58212).

2^1620960 is an apocalyptic number.

1620960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1620960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2794176).

1620960 is an abundant number, since it is smaller than the sum of its proper divisors (3967392).

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

1620960 is a wasteful number, since it uses less digits than its factorization.

1620960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 1620960 is about 1273.1692738988. The cubic root of 1620960 is about 117.4692238697.

The spelling of 1620960 in words is "one million, six hundred twenty thousand, nine hundred sixty".