1623120980 has 72 divisors (see below), whose sum is σ = 3874340232. Its totient is φ = 567730944.

The previous prime is 1623120979. The next prime is 1623121007. The reversal of 1623120980 is 890213261.

It can be written as a sum of positive squares in 4 ways, for example, as 43217476 + 1579903504 = 6574^2 + 39748^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85214 + ... + 102506.

It is an arithmetic number, because the mean of its divisors is an integer number (53810281).

Almost surely, 2^1623120980 is an apocalyptic number.

1623120980 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 1623120980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1937170116).

1623120980 is an abundant number, since it is smaller than the sum of its proper divisors (2251219252).

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

1623120980 is a wasteful number, since it uses less digits than its factorization.

1623120980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17353 (or 17332 counting only the distinct ones).

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

The square root of 1623120980 is about 40287.9756254891. The cubic root of 1623120980 is about 1175.2140198652.

The spelling of 1623120980 in words is "one billion, six hundred twenty-three million, one hundred twenty thousand, nine hundred eighty".