387543840 has 48 divisors (see below), whose sum is σ = 1220764608. Its totient is φ = 103344896.

The previous prime is 387543839. The next prime is 387543841. The reversal of 387543840 is 48345783.

It is an interprime number because it is at equal distance from previous prime (387543839) and next prime (387543841).

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 387543792 and 387543801.

It is not an unprimeable number, because it can be changed into a prime (387543841) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 403212 + ... + 404171.

It is an arithmetic number, because the mean of its divisors is an integer number (25432596).

Almost surely, 2^387543840 is an apocalyptic number.

387543840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

387543840 is an abundant number, since it is smaller than the sum of its proper divisors (833220768).

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

387543840 is a wasteful number, since it uses less digits than its factorization.

387543840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807401 (or 807393 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The square root of 387543840 is about 19686.1331906497. The cubic root of 387543840 is about 729.0773606798.

The spelling of 387543840 in words is "three hundred eighty-seven million, five hundred forty-three thousand, eight hundred forty".