774181980 has 288 divisors, whose sum is σ = 2905943040. Its totient is φ = 164021760.

The previous prime is 774181957. The next prime is 774182027. The reversal of 774181980 is 89181477.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 488269 + ... + 489851.

It is an arithmetic number, because the mean of its divisors is an integer number (10090080).

Almost surely, 2^774181980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 774181980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1452971520).

774181980 is an abundant number, since it is smaller than the sum of its proper divisors (2131761060).

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

774181980 is a wasteful number, since it uses less digits than its factorization.

774181980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641 (or 1636 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 45.

The square root of 774181980 is about 27824.1258622800. The cubic root of 774181980 is about 918.2219834256.

The spelling of 774181980 in words is "seven hundred seventy-four million, one hundred eighty-one thousand, nine hundred eighty".