772985840 has 160 divisors (see below), whose sum is σ = 2066867712. Its totient is φ = 266112000.

The previous prime is 772985821. The next prime is 772985893. The reversal of 772985840 is 48589277.

772985840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 3663335 + ... + 3663545.

Almost surely, 2^772985840 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 772985840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1033433856).

772985840 is an abundant number, since it is smaller than the sum of its proper divisors (1293881872).

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

772985840 is a wasteful number, since it uses less digits than its factorization.

772985840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 50.

The square root of 772985840 is about 27802.6228978490. The cubic root of 772985840 is about 917.7488439455.

It can be divided in two parts, 77298 and 5840, that added together give a palindrome (83138).

The spelling of 772985840 in words is "seven hundred seventy-two million, nine hundred eighty-five thousand, eight hundred forty".