772803220 has 96 divisors (see below), whose sum is σ = 1954326528. Its totient is φ = 250960512.

The previous prime is 772803209. The next prime is 772803233. The reversal of 772803220 is 22308277.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 343419 + ... + 345661.

It is an arithmetic number, because the mean of its divisors is an integer number (20357568).

Almost surely, 2^772803220 is an apocalyptic number.

772803220 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 772803220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (977163264).

772803220 is an abundant number, since it is smaller than the sum of its proper divisors (1181523308).

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

772803220 is a wasteful number, since it uses less digits than its factorization.

772803220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2389 (or 2387 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 772803220 is about 27799.3384813380. The cubic root of 772803220 is about 917.6765647024.

The spelling of 772803220 in words is "seven hundred seventy-two million, eight hundred three thousand, two hundred twenty".