390550528 has 44 divisors (see below), whose sum is σ = 783255892. Its totient is φ = 194641920.

The previous prime is 390550513. The next prime is 390550547. The reversal of 390550528 is 825055093.

It can be written as a sum of positive squares in 2 ways, for example, as 361304064 + 29246464 = 19008^2 + 5408^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 590518 + ... + 591178.

Almost surely, 2^390550528 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 390550528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (391627946).

390550528 is an abundant number, since it is smaller than the sum of its proper divisors (392705364).

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

390550528 is an equidigital number, since it uses as much as digits as its factorization.

390550528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258 (or 1240 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 390550528 is about 19762.3512771128. The cubic root of 390550528 is about 730.9579766783.

The spelling of 390550528 in words is "three hundred ninety million, five hundred fifty thousand, five hundred twenty-eight".