387660725 has 12 divisors (see below), whose sum is σ = 485461860. Its totient is φ = 307056000.

The previous prime is 387660671. The next prime is 387660751. The reversal of 387660725 is 527066783.

It can be written as a sum of positive squares in 6 ways, for example, as 20593444 + 367067281 = 4538^2 + 19159^2 .

It is not a de Polignac number, because 387660725 - 2¹² = 387656629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74240 + ... + 79289.

It is an arithmetic number, because the mean of its divisors is an integer number (40455155).

Almost surely, 2^387660725 is an apocalyptic number.

It is an amenable number.

387660725 is a deficient number, since it is larger than the sum of its proper divisors (97801135).

387660725 is a wasteful number, since it uses less digits than its factorization.

387660725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153640 (or 153635 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 44.

The square root of 387660725 is about 19689.1016808792. The cubic root of 387660725 is about 729.1506510042.

The spelling of 387660725 in words is "three hundred eighty-seven million, six hundred sixty thousand, seven hundred twenty-five".