773640 has 96 divisors (see below), whose sum is σ = 2882880. Its totient is φ = 176256.

The previous prime is 773611. The next prime is 773657. The reversal of 773640 is 46377.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 773640.

It is an unprimeable number.

773640 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2367 + ... + 2673.

It is an arithmetic number, because the mean of its divisors is an integer number (30030).

2⁷⁷³⁶⁴⁰ is an apocalyptic number.

773640 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 773640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1441440).

773640 is an abundant number, since it is smaller than the sum of its proper divisors (2109240).

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

773640 is a wasteful number, since it uses less digits than its factorization.

773640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 773640 is about 879.5680758190. The cubic root of 773640 is about 91.8007660807.

It can be divided in two parts, 7736 and 40, that added together give a 5-th power (7776 = 6⁵).

The spelling of 773640 in words is "seven hundred seventy-three thousand, six hundred forty".