782448380 has 48 divisors (see below), whose sum is σ = 1888427520. Its totient is φ = 266760768.

The previous prime is 782448377. The next prime is 782448389. The reversal of 782448380 is 83844287.

It is a super-2 number, since 2×782448380² = 1224450934729248800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (782448389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9449 + ... + 40671.

It is an arithmetic number, because the mean of its divisors is an integer number (39342240).

Almost surely, 2^782448380 is an apocalyptic number.

782448380 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 782448380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (944213760).

782448380 is an abundant number, since it is smaller than the sum of its proper divisors (1105979140).

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

782448380 is a wasteful number, since it uses less digits than its factorization.

782448380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31418 (or 31416 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 44.

The square root of 782448380 is about 27972.2787773896. The cubic root of 782448380 is about 921.4785535110.

The spelling of 782448380 in words is "seven hundred eighty-two million, four hundred forty-eight thousand, three hundred eighty".