774147440 has 40 divisors (see below), whose sum is σ = 1963521648. Its totient is φ = 281507840.

The previous prime is 774147433. The next prime is 774147449. The reversal of 774147440 is 44741477.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 774147394 and 774147403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (774147449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 438977 + ... + 440736.

Almost surely, 2^774147440 is an apocalyptic number.

It is an amenable number.

774147440 is an abundant number, since it is smaller than the sum of its proper divisors (1189374208).

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

774147440 is a wasteful number, since it uses less digits than its factorization.

774147440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879737 (or 879731 counting only the distinct ones).

The product of its (nonzero) digits is 87808, while the sum is 38.

The square root of 774147440 is about 27823.5051709881. The cubic root of 774147440 is about 918.2083277823.

The spelling of 774147440 in words is "seven hundred seventy-four million, one hundred forty-seven thousand, four hundred forty".