7730215740 has 216 divisors, whose sum is σ = 26653955328. Its totient is φ = 1802476800.

The previous prime is 7730215723. The next prime is 7730215793. The reversal of 7730215740 is 475120377.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 7730215695 and 7730215704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 840165 + ... + 849315.

Almost surely, 2^7730215740 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 7730215740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13326977664).

7730215740 is an abundant number, since it is smaller than the sum of its proper divisors (18923739588).

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

7730215740 is a wasteful number, since it uses less digits than its factorization.

7730215740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9217 (or 9193 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 36.

The square root of 7730215740 is about 87921.6454577597. The cubic root of 7730215740 is about 1977.2604138087.

The spelling of 7730215740 in words is "seven billion, seven hundred thirty million, two hundred fifteen thousand, seven hundred forty".