778873040 has 40 divisors (see below), whose sum is σ = 1975507488. Its totient is φ = 283226240.

The previous prime is 778873033. The next prime is 778873103. The reversal of 778873040 is 40378877.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 778872982 and 778873000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441662 + ... + 443421.

Almost surely, 2^778873040 is an apocalyptic number.

It is an amenable number.

778873040 is an abundant number, since it is smaller than the sum of its proper divisors (1196634448).

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

778873040 is a wasteful number, since it uses less digits than its factorization.

778873040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885107 (or 885101 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 44.

The square root of 778873040 is about 27908.2969741975. The cubic root of 778873040 is about 920.0728675744.

The spelling of 778873040 in words is "seven hundred seventy-eight million, eight hundred seventy-three thousand, forty".