387784404 has 144 divisors (see below), whose sum is σ = 1184601600. Its totient is φ = 104606208.

The previous prime is 387784387. The next prime is 387784417. The reversal of 387784404 is 404487783.

It is a self number, because there is not a number n which added to its sum of digits gives 387784404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 342912 + ... + 344040.

It is an arithmetic number, because the mean of its divisors is an integer number (8226400).

Almost surely, 2^387784404 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 387784404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (592300800).

387784404 is an abundant number, since it is smaller than the sum of its proper divisors (796817196).

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

387784404 is a wasteful number, since it uses less digits than its factorization.

387784404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222 (or 1217 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 45.

The square root of 387784404 is about 19692.2422288575. The cubic root of 387784404 is about 729.2281853264.

The spelling of 387784404 in words is "three hundred eighty-seven million, seven hundred eighty-four thousand, four hundred four".