387256545 has 40 divisors (see below), whose sum is σ = 747602856. Its totient is φ = 190646784.

The previous prime is 387256501. The next prime is 387256553. The reversal of 387256545 is 545652783.

387256545 is a `hidden beast` number, since 3 + 87 + 2 + 565 + 4 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3370896 + 383885649 = 1836^2 + 19593^2 .

It is not a de Polignac number, because 387256545 - 2⁷ = 387256417 is a prime.

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

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 387256545.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 31512 + ... + 42041.

Almost surely, 2^387256545 is an apocalyptic number.

It is an amenable number.

387256545 is a deficient number, since it is larger than the sum of its proper divisors (360346311).

387256545 is a wasteful number, since it uses less digits than its factorization.

387256545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73583 (or 73574 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 45.

The square root of 387256545 is about 19678.8349502708. The cubic root of 387256545 is about 728.8971556386.

The spelling of 387256545 in words is "three hundred eighty-seven million, two hundred fifty-six thousand, five hundred forty-five".