969746778 has 192 divisors, whose sum is σ = 2853107712. Its totient is φ = 229875840.

The previous prime is 969746773. The next prime is 969746779. The reversal of 969746778 is 877647969.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (969746773) 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, 1927675 + ... + 1928177.

It is an arithmetic number, because the mean of its divisors is an integer number (14859936).

Almost surely, 2^969746778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 969746778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1426553856).

969746778 is an abundant number, since it is smaller than the sum of its proper divisors (1883360934).

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

969746778 is a wasteful number, since it uses less digits than its factorization.

969746778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 646 counting only the distinct ones).

The product of its digits is 32006016, while the sum is 63.

The square root of 969746778 is about 31140.7575052374. The cubic root of 969746778 is about 989.8121529115.

It can be divided in two parts, 969 and 746778, that added together give a palindrome (747747).

The spelling of 969746778 in words is "nine hundred sixty-nine million, seven hundred forty-six thousand, seven hundred seventy-eight".