771069420 has 144 divisors (see below), whose sum is σ = 2569432320. Its totient is φ = 185616000.

The previous prime is 771069413. The next prime is 771069427. The reversal of 771069420 is 24960177.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (771069413) and next prime (771069427).

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

It is not an unprimeable number, because it can be changed into a prime (771069427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 297691 + ... + 300269.

It is an arithmetic number, because the mean of its divisors is an integer number (17843280).

Almost surely, 2^771069420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 771069420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1284716160).

771069420 is an abundant number, since it is smaller than the sum of its proper divisors (1798362900).

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

771069420 is a wasteful number, since it uses less digits than its factorization.

771069420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2756 (or 2751 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 771069420 is about 27768.1367758083. The cubic root of 771069420 is about 916.9897753895.

The spelling of 771069420 in words is "seven hundred seventy-one million, sixty-nine thousand, four hundred twenty".