390730145 has 8 divisors (see below), whose sum is σ = 504943656. Its totient is φ = 288539136.

The previous prime is 390730133. The next prime is 390730147. The reversal of 390730145 is 541037093.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4096576 + 386633569 = 2024^2 + 19663^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 390730145 - 2¹⁴ = 390713761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390730147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3005552 + ... + 3005681.

It is an arithmetic number, because the mean of its divisors is an integer number (63117957).

Almost surely, 2^390730145 is an apocalyptic number.

It is an amenable number.

390730145 is a deficient number, since it is larger than the sum of its proper divisors (114213511).

390730145 is a wasteful number, since it uses less digits than its factorization.

390730145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6011251.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 390730145 is about 19766.8951785555. The cubic root of 390730145 is about 731.0700171162.

The spelling of 390730145 in words is "three hundred ninety million, seven hundred thirty thousand, one hundred forty-five".