4445390 has 8 divisors (see below), whose sum is σ = 8001720. Its totient is φ = 1778152.

The previous prime is 4445387. The next prime is 4445393. The reversal of 4445390 is 935444.

It is an interprime number because it is at equal distance from previous prime (4445387) and next prime (4445393).

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

It is a super-2 number, since 2×4445390² = 39522984504200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4445393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222260 + ... + 222279.

It is an arithmetic number, because the mean of its divisors is an integer number (1000215).

Almost surely, 2^4445390 is an apocalyptic number.

4445390 is a deficient number, since it is larger than the sum of its proper divisors (3556330).

4445390 is a wasteful number, since it uses less digits than its factorization.

4445390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444546.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 4445390 is about 2108.4093530432. The cubic root of 4445390 is about 164.4257971646.

The spelling of 4445390 in words is "four million, four hundred forty-five thousand, three hundred ninety".