387840825 has 48 divisors (see below), whose sum is σ = 750001600. Its totient is φ = 195955200.

The previous prime is 387840821. The next prime is 387840833. The reversal of 387840825 is 528048783.

It is not a de Polignac number, because 387840825 - 2² = 387840821 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (387840821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2296 + ... + 27945.

Almost surely, 2^387840825 is an apocalyptic number.

It is an amenable number.

387840825 is a deficient number, since it is larger than the sum of its proper divisors (362160775).

387840825 is a wasteful number, since it uses less digits than its factorization.

387840825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30279 (or 30268 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The square root of 387840825 is about 19693.6747459686. The cubic root of 387840825 is about 729.2635501561.

The spelling of 387840825 in words is "three hundred eighty-seven million, eight hundred forty thousand, eight hundred twenty-five".