387221106 has 16 divisors (see below), whose sum is σ = 792453024. Its totient is φ = 126071904.

The previous prime is 387221101. The next prime is 387221143. The reversal of 387221106 is 601122783.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (387221101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 750171 + ... + 750686.

It is an arithmetic number, because the mean of its divisors is an integer number (49528314).

Almost surely, 2^387221106 is an apocalyptic number.

387221106 is an abundant number, since it is smaller than the sum of its proper divisors (405231918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

387221106 is a wasteful number, since it uses less digits than its factorization.

387221106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500905.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 387221106 is about 19677.9344952665. The cubic root of 387221106 is about 728.8749204437.

Adding to 387221106 its reverse (601122783), we get a palindrome (988343889).

The spelling of 387221106 in words is "three hundred eighty-seven million, two hundred twenty-one thousand, one hundred six".