390725000 has 48 divisors (see below), whose sum is σ = 915761700. Its totient is φ = 156280000.

The previous prime is 390724993. The next prime is 390725003. The reversal of 390725000 is 527093.

It can be written as a sum of positive squares in 6 ways, for example, as 188356 + 390536644 = 434^2 + 19762^2 .

It is not an unprimeable number, because it can be changed into a prime (390725003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17186 + ... + 32814.

Almost surely, 2^390725000 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 390725000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (457880850).

390725000 is an abundant number, since it is smaller than the sum of its proper divisors (525036700).

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

390725000 is an equidigital number, since it uses as much as digits as its factorization.

390725000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15660 (or 15636 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 390725000 is about 19766.7650362926. The cubic root of 390725000 is about 731.0668082760.

The spelling of 390725000 in words is "three hundred ninety million, seven hundred twenty-five thousand".