778965330 has 192 divisors, whose sum is σ = 2345583744. Its totient is φ = 163891200.

The previous prime is 778965307. The next prime is 778965331. The reversal of 778965330 is 33569877.

It is a self number, because there is not a number n which added to its sum of digits gives 778965330.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778965331) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 801745 + ... + 802715.

It is an arithmetic number, because the mean of its divisors is an integer number (12216582).

Almost surely, 2^778965330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 778965330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1172791872).

778965330 is an abundant number, since it is smaller than the sum of its proper divisors (1566618414).

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

778965330 is a wasteful number, since it uses less digits than its factorization.

778965330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033 (or 1022 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 48.

The square root of 778965330 is about 27909.9503761651. The cubic root of 778965330 is about 920.1092064756.

The spelling of 778965330 in words is "seven hundred seventy-eight million, nine hundred sixty-five thousand, three hundred thirty".