774990 has 48 divisors (see below), whose sum is σ = 2059200. Its totient is φ = 202176.

The previous prime is 774959. The next prime is 774997. The reversal of 774990 is 99477.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (774997) by changing a digit.

774990 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, 7056 + ... + 7164.

It is an arithmetic number, because the mean of its divisors is an integer number (42900).

2⁷⁷⁴⁹⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 774990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1029600).

774990 is an abundant number, since it is smaller than the sum of its proper divisors (1284210).

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

774990 is a wasteful number, since it uses less digits than its factorization.

774990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 774990 is about 880.3351634463. The cubic root of 774990 is about 91.8541324258.

It can be divided in two parts, 774 and 990, that added together give a square (1764 = 42²).

The spelling of 774990 in words is "seven hundred seventy-four thousand, nine hundred ninety".