387213090 has 32 divisors (see below), whose sum is σ = 1013795136. Its totient is φ = 93869760.

The previous prime is 387213077. The next prime is 387213109. The reversal of 387213090 is 90312783.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 586357 + ... + 587016.

It is an arithmetic number, because the mean of its divisors is an integer number (31681098).

Almost surely, 2^387213090 is an apocalyptic number.

387213090 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

387213090 is an abundant number, since it is smaller than the sum of its proper divisors (626582046).

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

387213090 is a wasteful number, since it uses less digits than its factorization.

387213090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173394.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 387213090 is about 19677.7308142987. The cubic root of 387213090 is about 728.8698908438.

The spelling of 387213090 in words is "three hundred eighty-seven million, two hundred thirteen thousand, ninety".