774240 has 48 divisors (see below), whose sum is σ = 2440368. Its totient is φ = 206336.

The previous prime is 774239. The next prime is 774283. The reversal of 774240 is 42477.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 774240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327 + ... + 1286.

It is an arithmetic number, because the mean of its divisors is an integer number (50841).

2⁷⁷⁴²⁴⁰ is an apocalyptic number.

It is an amenable number.

774240 is an abundant number, since it is smaller than the sum of its proper divisors (1666128).

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

774240 is a wasteful number, since it uses less digits than its factorization.

774240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631 (or 1623 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 24.

The square root of 774240 is about 879.9090862129. The cubic root of 774240 is about 91.8244921146.

It can be divided in two parts, 7 and 74240, that added together give a palindrome (74247).

The spelling of 774240 in words is "seven hundred seventy-four thousand, two hundred forty", and thus it is an iban number.