390226788 has 144 divisors (see below), whose sum is σ = 1239134400. Its totient is φ = 105598080.

The previous prime is 390226787. The next prime is 390226799. The reversal of 390226788 is 887622093.

It is not an unprimeable number, because it can be changed into a prime (390226787) 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 47 ways as a sum of consecutive naturals, for example, 98608 + ... + 102488.

It is an arithmetic number, because the mean of its divisors is an integer number (8605100).

Almost surely, 2^390226788 is an apocalyptic number.

390226788 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390226788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (619567200).

390226788 is an abundant number, since it is smaller than the sum of its proper divisors (848907612).

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

390226788 is a wasteful number, since it uses less digits than its factorization.

390226788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3927 (or 3912 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 390226788 is about 19754.1587520198. The cubic root of 390226788 is about 730.7559492539.

The spelling of 390226788 in words is "three hundred ninety million, two hundred twenty-six thousand, seven hundred eighty-eight".