387748491 has 8 divisors (see below), whose sum is σ = 556767120. Its totient is φ = 238614432.

The previous prime is 387748451. The next prime is 387748507. The reversal of 387748491 is 194847783.

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

It is a de Polignac number, because none of the positive numbers 2^k-387748491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (387748451) 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, 4971096 + ... + 4971173.

It is an arithmetic number, because the mean of its divisors is an integer number (69595890).

Almost surely, 2^387748491 is an apocalyptic number.

387748491 is a deficient number, since it is larger than the sum of its proper divisors (169018629).

387748491 is a wasteful number, since it uses less digits than its factorization.

387748491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9942285.

The product of its digits is 1354752, while the sum is 51.

The square root of 387748491 is about 19691.3303511977. The cubic root of 387748491 is about 729.2056731779.

The spelling of 387748491 in words is "three hundred eighty-seven million, seven hundred forty-eight thousand, four hundred ninety-one".