774648 has 96 divisors (see below), whose sum is σ = 2527200. Its totient is φ = 209664.

The previous prime is 774643. The next prime is 774661. The reversal of 774648 is 846477.

It is a happy number.

774648 is a `hidden beast` number, since 7 + 7 + 4 + 648 = 666.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 774648.

It is not an unprimeable number, because it can be changed into a prime (774643) by changing a digit.

774648 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, 14590 + ... + 14642.

It is an arithmetic number, because the mean of its divisors is an integer number (26325).

2⁷⁷⁴⁶⁴⁸ 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 774648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1263600).

774648 is an abundant number, since it is smaller than the sum of its proper divisors (1752552).

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

774648 is a wasteful number, since it uses less digits than its factorization.

774648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 94 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 774648 is about 880.1408978113. The cubic root of 774648 is about 91.8406188168.

The spelling of 774648 in words is "seven hundred seventy-four thousand, six hundred forty-eight".