387520211990 has 8 divisors (see below), whose sum is σ = 697536381600. Its totient is φ = 155008084792.

The previous prime is 387520211933. The next prime is 387520212007. The reversal of 387520211990 is 99112025783.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19376010590 + ... + 19376010609.

It is an arithmetic number, because the mean of its divisors is an integer number (87192047700).

Almost surely, 2^387520211990 is an apocalyptic number.

387520211990 is a deficient number, since it is larger than the sum of its proper divisors (310016169610).

387520211990 is a wasteful number, since it uses less digits than its factorization.

387520211990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38752021206.

The product of its (nonzero) digits is 272160, while the sum is 47.

The spelling of 387520211990 in words is "three hundred eighty-seven billion, five hundred twenty million, two hundred eleven thousand, nine hundred ninety".