387825631 has 8 divisors (see below), whose sum is σ = 391883184. Its totient is φ = 383784960.

The previous prime is 387825619. The next prime is 387825637. The reversal of 387825631 is 136528783.

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

It is a cyclic number.

It is not a de Polignac number, because 387825631 - 2²¹ = 385728479 is a prime.

It is a super-2 number, since 2×387825631² = 300817440121096322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387825637) 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, 44895 + ... + 52831.

It is an arithmetic number, because the mean of its divisors is an integer number (48985398).

Almost surely, 2^387825631 is an apocalyptic number.

387825631 is a deficient number, since it is larger than the sum of its proper divisors (4057553).

387825631 is a wasteful number, since it uses less digits than its factorization.

387825631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8441.

The product of its digits is 241920, while the sum is 43.

The square root of 387825631 is about 19693.2889838137. The cubic root of 387825631 is about 729.2540268548.

The spelling of 387825631 in words is "three hundred eighty-seven million, eight hundred twenty-five thousand, six hundred thirty-one".