7780379958 has 96 divisors (see below), whose sum is σ = 19395667200. Its totient is φ = 2234029248.

The previous prime is 7780379951. The next prime is 7780379963. The reversal of 7780379958 is 8599730877.

It is a junction number, because it is equal to n+sod(n) for n = 7780379895 and 7780379904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7780379951) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 284823 + ... + 310941.

It is an arithmetic number, because the mean of its divisors is an integer number (202038200).

Almost surely, 2^7780379958 is an apocalyptic number.

7780379958 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 7780379958, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9697833600).

7780379958 is an abundant number, since it is smaller than the sum of its proper divisors (11615287242).

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

7780379958 is a wasteful number, since it uses less digits than its factorization.

7780379958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26226 (or 26223 counting only the distinct ones).

The product of its (nonzero) digits is 26671680, while the sum is 63.

The square root of 7780379958 is about 88206.4621102105. The cubic root of 7780379958 is about 1981.5282523240.

The spelling of 7780379958 in words is "seven billion, seven hundred eighty million, three hundred seventy-nine thousand, nine hundred fifty-eight".