384687720 has 48 divisors (see below), whose sum is σ = 1250236260. Its totient is φ = 102583296.

The previous prime is 384687703. The next prime is 384687767. The reversal of 384687720 is 27786483.

It is a happy number.

384687720 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 364275396 + 20412324 = 19086^2 + 4518^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 533929 + ... + 534648.

Almost surely, 2^384687720 is an apocalyptic number.

384687720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

384687720 is an abundant number, since it is smaller than the sum of its proper divisors (865548540).

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

384687720 is a wasteful number, since it uses less digits than its factorization.

384687720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068594 (or 1068587 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 384687720 is about 19613.4576248045. The cubic root of 384687720 is about 727.2818916080.

The spelling of 384687720 in words is "three hundred eighty-four million, six hundred eighty-seven thousand, seven hundred twenty".