7758920340 has 120 divisors (see below), whose sum is σ = 24673821480. Its totient is φ = 2040671232.

The previous prime is 7758920321. The next prime is 7758920363. The reversal of 7758920340 is 430298577.

7758920340 is a `hidden beast` number, since 7 + 7 + 589 + 20 + 3 + 40 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2412970884 + 5345949456 = 49122^2 + 73116^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 85456 + ... + 151064.

It is an arithmetic number, because the mean of its divisors is an integer number (205615179).

Almost surely, 2^7758920340 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 7758920340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12336910740).

7758920340 is an abundant number, since it is smaller than the sum of its proper divisors (16914901140).

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

7758920340 is a wasteful number, since it uses less digits than its factorization.

7758920340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65703 (or 65692 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 7758920340 is about 88084.7338646147. The cubic root of 7758920340 is about 1979.7047769203.

The spelling of 7758920340 in words is "seven billion, seven hundred fifty-eight million, nine hundred twenty thousand, three hundred forty".