390389760 has 224 divisors, whose sum is σ = 1391899680. Its totient is φ = 103809024.

The previous prime is 390389749. The next prime is 390389773. The reversal of 390389760 is 67983093.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1105744 + ... + 1106096.

Almost surely, 2^390389760 is an apocalyptic number.

390389760 is a gapful number since it is divisible by the number (30) 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 390389760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (695949840).

390389760 is an abundant number, since it is smaller than the sum of its proper divisors (1001509920).

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

390389760 is an equidigital number, since it uses as much as digits as its factorization.

390389760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 390389760 is about 19758.2833262407. The cubic root of 390389760 is about 730.8576646213.

The spelling of 390389760 in words is "three hundred ninety million, three hundred eighty-nine thousand, seven hundred sixty".