1623320 has 16 divisors (see below), whose sum is σ = 3652560. Its totient is φ = 649312.

The previous prime is 1623319. The next prime is 1623361. The reversal of 1623320 is 233261.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20252 + ... + 20331.

It is an arithmetic number, because the mean of its divisors is an integer number (228285).

2^1623320 is an apocalyptic number.

1623320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1623320 is an abundant number, since it is smaller than the sum of its proper divisors (2029240).

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

1623320 is a wasteful number, since it uses less digits than its factorization.

1623320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40594 (or 40590 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1623320 is about 1274.0957577828. The cubic root of 1623320 is about 117.5262051104.

Adding to 1623320 its reverse (233261), we get a palindrome (1856581).

The spelling of 1623320 in words is "one million, six hundred twenty-three thousand, three hundred twenty".