390750 has 32 divisors (see below), whose sum is σ = 977184. Its totient is φ = 104000.

The previous prime is 390743. The next prime is 390751. The reversal of 390750 is 57093.

It is a self number, because there is not a number n which added to its sum of digits gives 390750.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390751) 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 15 ways as a sum of consecutive naturals, for example, 490 + ... + 1010.

It is an arithmetic number, because the mean of its divisors is an integer number (30537).

2³⁹⁰⁷⁵⁰ is an apocalyptic number.

390750 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 390750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (488592).

390750 is an abundant number, since it is smaller than the sum of its proper divisors (586434).

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

390750 is a wasteful number, since it uses less digits than its factorization.

390750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541 (or 531 counting only the distinct ones).

The product of its (nonzero) digits is 945, while the sum is 24.

The square root of 390750 is about 625.0999920013. The cubic root of 390750 is about 73.1082400044.

The spelling of 390750 in words is "three hundred ninety thousand, seven hundred fifty".