774490429440 has 1920 divisors, whose sum is σ = 3537501327360. Its totient is φ = 157659955200.

The previous prime is 774490429421. The next prime is 774490429451. The reversal of 774490429440 is 44924094477.

774490429440 is a `hidden beast` number, since 7 + 74 + 4 + 90 + 42 + 9 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (1920).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 2339850075 + ... + 2339850405.

It is an arithmetic number, because the mean of its divisors is an integer number (1842448608).

Almost surely, 2^774490429440 is an apocalyptic number.

774490429440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 774490429440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1768750663680).

774490429440 is an abundant number, since it is smaller than the sum of its proper divisors (2763010897920).

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

774490429440 is a wasteful number, since it uses less digits than its factorization.

774490429440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 54.

The spelling of 774490429440 in words is "seven hundred seventy-four billion, four hundred ninety million, four hundred twenty-nine thousand, four hundred forty".