783316640 has 96 divisors (see below), whose sum is σ = 1911216384. Its totient is φ = 303160320.

The previous prime is 783316637. The next prime is 783316657. The reversal of 783316640 is 46613387.

It is a super-2 number, since 2×783316640² = 1227169917001779200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 783316594 and 783316603.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1817225 + ... + 1817655.

It is an arithmetic number, because the mean of its divisors is an integer number (19908504).

Almost surely, 2^783316640 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 783316640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (955608192).

783316640 is an abundant number, since it is smaller than the sum of its proper divisors (1127899744).

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

783316640 is a wasteful number, since it uses less digits than its factorization.

783316640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790 (or 782 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 783316640 is about 27987.7944825954. The cubic root of 783316640 is about 921.8192734140.

The spelling of 783316640 in words is "seven hundred eighty-three million, three hundred sixteen thousand, six hundred forty".