387666290 has 16 divisors (see below), whose sum is σ = 761235840. Its totient is φ = 140969520.

The previous prime is 387666277. The next prime is 387666299. The reversal of 387666290 is 92666783.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (387666299) 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, 1762010 + ... + 1762229.

It is an arithmetic number, because the mean of its divisors is an integer number (47577240).

Almost surely, 2^387666290 is an apocalyptic number.

387666290 is a deficient number, since it is larger than the sum of its proper divisors (373569550).

387666290 is a wasteful number, since it uses less digits than its factorization.

387666290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3524257.

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 387666290 is about 19689.2430022081. The cubic root of 387666290 is about 729.1541400551.

The spelling of 387666290 in words is "three hundred eighty-seven million, six hundred sixty-six thousand, two hundred ninety".