1621483520 has 112 divisors (see below), whose sum is σ = 4019995008. Its totient is φ = 627179520.

The previous prime is 1621483469. The next prime is 1621483529. The reversal of 1621483520 is 253841261.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621483529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1269122 + ... + 1270398.

Almost surely, 2^1621483520 is an apocalyptic number.

1621483520 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 1621483520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2009997504).

1621483520 is an abundant number, since it is smaller than the sum of its proper divisors (2398511488).

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

1621483520 is an equidigital number, since it uses as much as digits as its factorization.

1621483520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339 (or 1315 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 1621483520 is about 40267.6485531500. The cubic root of 1621483520 is about 1174.8186881847.

The spelling of 1621483520 in words is "one billion, six hundred twenty-one million, four hundred eighty-three thousand, five hundred twenty".