1620413520 has 320 divisors, whose sum is σ = 5752560384. Its totient is φ = 373800960.

The previous prime is 1620413507. The next prime is 1620413551. The reversal of 1620413520 is 253140261.

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 (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5176884 + ... + 5177196.

Almost surely, 2^1620413520 is an apocalyptic number.

1620413520 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 1620413520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2876280192).

1620413520 is an abundant number, since it is smaller than the sum of its proper divisors (4132146864).

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

1620413520 is a wasteful number, since it uses less digits than its factorization.

1620413520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430 (or 424 counting only the distinct ones).

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

The square root of 1620413520 is about 40254.3602607221. The cubic root of 1620413520 is about 1174.5602144705.

Adding to 1620413520 its reverse (253140261), we get a palindrome (1873553781).

It can be divided in two parts, 162041 and 3520, that added together give a palindrome (165561).

The spelling of 1620413520 in words is "one billion, six hundred twenty million, four hundred thirteen thousand, five hundred twenty".