387242805 has 16 divisors (see below), whose sum is σ = 623750400. Its totient is φ = 205142208.

The previous prime is 387242749. The next prime is 387242831. The reversal of 387242805 is 508242783.

It is not a de Polignac number, because 387242805 - 2¹³ = 387234613 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84397 + ... + 88866.

It is an arithmetic number, because the mean of its divisors is an integer number (38984400).

Almost surely, 2^387242805 is an apocalyptic number.

It is an amenable number.

387242805 is a deficient number, since it is larger than the sum of its proper divisors (236507595).

387242805 is a wasteful number, since it uses less digits than its factorization.

387242805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173420.

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 387242805 is about 19678.4858411413. The cubic root of 387242805 is about 728.8885350265. Note that the first 3 decimals are identical.

The spelling of 387242805 in words is "three hundred eighty-seven million, two hundred forty-two thousand, eight hundred five".