38687780 has 12 divisors (see below), whose sum is σ = 81244380. Its totient is φ = 15475104.

The previous prime is 38687777. The next prime is 38687809. The reversal of 38687780 is 8778683.

It can be written as a sum of positive squares in 2 ways, for example, as 15570916 + 23116864 = 3946^2 + 4808^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 967175 + ... + 967214.

It is an arithmetic number, because the mean of its divisors is an integer number (6770365).

Almost surely, 2^38687780 is an apocalyptic number.

It is an amenable number.

38687780 is an abundant number, since it is smaller than the sum of its proper divisors (42556600).

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

38687780 is a wasteful number, since it uses less digits than its factorization.

38687780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1934398 (or 1934396 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 38687780 is about 6219.9501605720. The cubic root of 38687780 is about 338.2137578578.

The spelling of 38687780 in words is "thirty-eight million, six hundred eighty-seven thousand, seven hundred eighty".