390341780 has 24 divisors (see below), whose sum is σ = 820122408. Its totient is φ = 156059648.

The previous prime is 390341747. The next prime is 390341789. The reversal of 390341780 is 87143093.

It can be written as a sum of positive squares in 4 ways, for example, as 4376464 + 385965316 = 2092^2 + 19646^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 390341780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390341789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54572 + ... + 61308.

It is an arithmetic number, because the mean of its divisors is an integer number (34171767).

Almost surely, 2^390341780 is an apocalyptic number.

It is an amenable number.

390341780 is an abundant number, since it is smaller than the sum of its proper divisors (429780628).

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

390341780 is a wasteful number, since it uses less digits than its factorization.

390341780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9643 (or 9641 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 390341780 is about 19757.0691146233. The cubic root of 390341780 is about 730.8277219068.

The spelling of 390341780 in words is "three hundred ninety million, three hundred forty-one thousand, seven hundred eighty".