1620123504 has 80 divisors (see below), whose sum is σ = 4291546752. Its totient is φ = 526466304.

The previous prime is 1620123499. The next prime is 1620123517. The reversal of 1620123504 is 4053210261.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 412719 + ... + 416625.

Almost surely, 2^1620123504 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 1620123504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2145773376).

1620123504 is an abundant number, since it is smaller than the sum of its proper divisors (2671423248).

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

1620123504 is a wasteful number, since it uses less digits than its factorization.

1620123504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4134 (or 4128 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1620123504 is about 40250.7578065308. The cubic root of 1620123504 is about 1174.4901373832.

Adding to 1620123504 its reverse (4053210261), we get a palindrome (5673333765).

The spelling of 1620123504 in words is "one billion, six hundred twenty million, one hundred twenty-three thousand, five hundred four".