778152240 has 60 divisors (see below), whose sum is σ = 2613297024. Its totient is φ = 207507072.

The previous prime is 778152233. The next prime is 778152259. The reversal of 778152240 is 42251877.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a junction number, because it is equal to n+sod(n) for n = 778152195 and 778152204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 539664 + ... + 541103.

Almost surely, 2^778152240 is an apocalyptic number.

It is an amenable number.

778152240 is an abundant number, since it is smaller than the sum of its proper divisors (1835144784).

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

778152240 is a wasteful number, since it uses less digits than its factorization.

778152240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080786 (or 1080777 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 778152240 is about 27895.3802626887. The cubic root of 778152240 is about 919.7889560020.

The spelling of 778152240 in words is "seven hundred seventy-eight million, one hundred fifty-two thousand, two hundred forty".