390012012 has 144 divisors (see below), whose sum is σ = 1166780160. Its totient is φ = 108687744.

The previous prime is 390011971. The next prime is 390012013. The reversal of 390012012 is 210210093.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (390012013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 203563 + ... + 205469.

It is an arithmetic number, because the mean of its divisors is an integer number (8102640).

Almost surely, 2^390012012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390012012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (583390080).

390012012 is an abundant number, since it is smaller than the sum of its proper divisors (776768148).

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

390012012 is a wasteful number, since it uses less digits than its factorization.

390012012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1972 (or 1967 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 390012012 is about 19748.7217814217. The cubic root of 390012012 is about 730.6218583033.

The spelling of 390012012 in words is "three hundred ninety million, twelve thousand, twelve".