772928720 has 80 divisors (see below), whose sum is σ = 1867380480. Its totient is φ = 297292800.

The previous prime is 772928719. The next prime is 772928753. The reversal of 772928720 is 27829277.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231221 + ... + 234539.

It is an arithmetic number, because the mean of its divisors is an integer number (23342256).

Almost surely, 2^772928720 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 772928720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (933690240).

772928720 is an abundant number, since it is smaller than the sum of its proper divisors (1094451760).

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

772928720 is a wasteful number, since it uses less digits than its factorization.

772928720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3444 (or 3438 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 772928720 is about 27801.5956376608. The cubic root of 772928720 is about 917.7262376214.

The spelling of 772928720 in words is "seven hundred seventy-two million, nine hundred twenty-eight thousand, seven hundred twenty".