387302638 has 4 divisors (see below), whose sum is σ = 580953960. Its totient is φ = 193651318.

The previous prime is 387302621. The next prime is 387302639. The reversal of 387302638 is 836203783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 836203783 = 7127 ⋅117329.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 387302638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387302639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96825658 + ... + 96825661.

It is an arithmetic number, because the mean of its divisors is an integer number (145238490).

Almost surely, 2^387302638 is an apocalyptic number.

387302638 is a deficient number, since it is larger than the sum of its proper divisors (193651322).

387302638 is a wasteful number, since it uses less digits than its factorization.

387302638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193651321.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 387302638 is about 19680.0060467470. The cubic root of 387302638 is about 728.9260733541.

The spelling of 387302638 in words is "three hundred eighty-seven million, three hundred two thousand, six hundred thirty-eight".