778012236 has 48 divisors (see below), whose sum is σ = 2021555200. Its totient is φ = 258760656.

The previous prime is 778012231. The next prime is 778012253. The reversal of 778012236 is 632210877.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 778012236.

It is not an unprimeable number, because it can be changed into a prime (778012231) 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, 42225 + ... + 57783.

Almost surely, 2^778012236 is an apocalyptic number.

It is an amenable number.

778012236 is an abundant number, since it is smaller than the sum of its proper divisors (1243542964).

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

778012236 is a wasteful number, since it uses less digits than its factorization.

778012236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16035 (or 16027 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 778012236 is about 27892.8707020271. The cubic root of 778012236 is about 919.7337903372.

The spelling of 778012236 in words is "seven hundred seventy-eight million, twelve thousand, two hundred thirty-six".