770819742 has 96 divisors (see below), whose sum is σ = 2138632704. Its totient is φ = 194788800.

The previous prime is 770819741. The next prime is 770819767. The reversal of 770819742 is 247918077.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (770819741) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43767 + ... + 58797.

It is an arithmetic number, because the mean of its divisors is an integer number (22277424).

Almost surely, 2^770819742 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 770819742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1069316352).

770819742 is an abundant number, since it is smaller than the sum of its proper divisors (1367812962).

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

770819742 is a wasteful number, since it uses less digits than its factorization.

770819742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15094 (or 15091 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The square root of 770819742 is about 27763.6406474367. The cubic root of 770819742 is about 916.8907886732.

The spelling of 770819742 in words is "seven hundred seventy million, eight hundred nineteen thousand, seven hundred forty-two".