783740816 has 20 divisors (see below), whose sum is σ = 1519891932. Its totient is φ = 391510656.

The previous prime is 783740809. The next prime is 783740819. The reversal of 783740816 is 618047387.

It can be written as a sum of positive squares in 2 ways, for example, as 65286400 + 718454416 = 8080^2 + 26804^2 .

It is a super-2 number, since 2×783740816² = 1228499333328691712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (783740819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4055 + ... + 39798.

Almost surely, 2^783740816 is an apocalyptic number.

It is an amenable number.

783740816 is a deficient number, since it is larger than the sum of its proper divisors (736151116).

783740816 is a wasteful number, since it uses less digits than its factorization.

783740816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44978 (or 44972 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 783740816 is about 27995.3713317041. The cubic root of 783740816 is about 921.9856357055.

The spelling of 783740816 in words is "seven hundred eighty-three million, seven hundred forty thousand, eight hundred sixteen".