• 774 can be written using four 4's:
774 has 12 divisors (see below), whose sum is σ = 1716. Its totient is φ = 252.
The previous prime is 773. The next prime is 787. The reversal of 774 is 477.
It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 43 = 774 / (7 + 7 + 4).
It is a Curzon number.
It is a plaindrome in base 13 and base 15.
It is a nialpdrome in base 6, base 10 and base 11.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (773) by changing a digit.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4 + ... + 39.
It is an arithmetic number, because the mean of its divisors is an integer number (143).
774 is an abundant number, since it is smaller than the sum of its proper divisors (942).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
774 is a wasteful number, since it uses less digits than its factorization.
It is an anagram of its base 13 representation: 774 = (477)13.
774 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 51 (or 48 counting only the distinct ones).
The product of its digits is 196, while the sum is 18.
The square root of 774 is about 27.8208554865. The cubic root of 774 is about 9.1815003172.
It can be divided in two parts, 77 and 4, that added together give a 4-th power (81 = 34).
The spelling of 774 in words is "seven hundred seventy-four", and thus it is an aban number and an iban number.
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