7621988416 has 63 divisors (see below), whose sum is σ = 17605544799. Its totient is φ = 3264471168.

The previous prime is 7621988393. The next prime is 7621988417. The reversal of 7621988416 is 6148891267.

The square root of 7621988416 is 87304.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7621988417) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4888245 + ... + 4889803.

Almost surely, 2^7621988416 is an apocalyptic number.

7621988416 is the 87304-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7621988416

7621988416 is an abundant number, since it is smaller than the sum of its proper divisors (9983556383).

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

7621988416 is an frugal number, since it uses more digits than its factorization.

7621988416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3144 (or 1568 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 52.

The cubic root of 7621988416 is about 1967.9894297359.

The spelling of 7621988416 in words is "seven billion, six hundred twenty-one million, nine hundred eighty-eight thousand, four hundred sixteen".