7621890048 has 130 divisors (see below), whose sum is σ = 22769784114. Its totient is φ = 2540519424.

The previous prime is 7621890013. The next prime is 7621890097. The reversal of 7621890048 is 8400981267.

It can be written as a sum of positive squares in only one way, i.e., 6689931264 + 931958784 = 81792^2 + 30528^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7621889985 and 7621890012.

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 9 ways as a sum of consecutive naturals, for example, 320290 + ... + 343262.

Almost surely, 2^7621890048 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 7621890048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11384892057).

7621890048 is an abundant number, since it is smaller than the sum of its proper divisors (15147894066).

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

7621890048 is an equidigital number, since it uses as much as digits as its factorization.

7621890048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23009 (or 22978 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 7621890048 is about 87303.4366333880. The cubic root of 7621890048 is about 1967.9809635279.

The spelling of 7621890048 in words is "seven billion, six hundred twenty-one million, eight hundred ninety thousand, forty-eight".