1621062432 has 144 divisors (see below), whose sum is σ = 5052378240. Its totient is φ = 488947200.

The previous prime is 1621062407. The next prime is 1621062439. The reversal of 1621062432 is 2342601261.

1621062432 is a `hidden beast` number, since 1 + 6 + 2 + 1 + 0 + 624 + 32 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a junction number, because it is equal to n+sod(n) for n = 1621062396 and 1621062405.

It is not an unprimeable number, because it can be changed into a prime (1621062439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 756082 + ... + 758222.

It is an arithmetic number, because the mean of its divisors is an integer number (35085960).

Almost surely, 2^1621062432 is an apocalyptic number.

1621062432 is a gapful number since it is divisible by the number (12) 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 1621062432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2526189120).

1621062432 is an abundant number, since it is smaller than the sum of its proper divisors (3431315808).

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

1621062432 is a wasteful number, since it uses less digits than its factorization.

1621062432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407 (or 2396 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1621062432 is about 40262.4195994230. The cubic root of 1621062432 is about 1174.7169819642.

Adding to 1621062432 its reverse (2342601261), we get a palindrome (3963663693).

The spelling of 1621062432 in words is "one billion, six hundred twenty-one million, sixty-two thousand, four hundred thirty-two".