387824681 has 8 divisors (see below), whose sum is σ = 389641344. Its totient is φ = 386012880.

The previous prime is 387824659. The next prime is 387824687. The reversal of 387824681 is 186428783.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387824681 is a prime.

It is a super-2 number, since 2×387824681² = 300815966385503522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387824687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344786 + ... + 345908.

It is an arithmetic number, because the mean of its divisors is an integer number (48705168).

Almost surely, 2^387824681 is an apocalyptic number.

It is an amenable number.

387824681 is a deficient number, since it is larger than the sum of its proper divisors (1816663).

387824681 is a wasteful number, since it uses less digits than its factorization.

387824681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431.

The product of its digits is 516096, while the sum is 47.

The square root of 387824681 is about 19693.2648639072. The cubic root of 387824681 is about 729.2534314052.

The spelling of 387824681 in words is "three hundred eighty-seven million, eight hundred twenty-four thousand, six hundred eighty-one".