387778380 has 144 divisors (see below), whose sum is σ = 1232673792. Its totient is φ = 90921600.

The previous prime is 387778337. The next prime is 387778397. The reversal of 387778380 is 83877783.

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, 224199 + ... + 225921.

Almost surely, 2^387778380 is an apocalyptic number.

387778380 is a gapful number since it is divisible by the number (30) 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 387778380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (616336896).

387778380 is an abundant number, since it is smaller than the sum of its proper divisors (844895412).

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

387778380 is a wasteful number, since it uses less digits than its factorization.

387778380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788 (or 1775 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 51.

The square root of 387778380 is about 19692.0892746301. The cubic root of 387778380 is about 729.2244092649.

The spelling of 387778380 in words is "three hundred eighty-seven million, seven hundred seventy-eight thousand, three hundred eighty".