4390457 has 4 divisors (see below), whose sum is σ = 4509156. Its totient is φ = 4271760.

The previous prime is 4390453. The next prime is 4390469. The reversal of 4390457 is 7540934.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7540934 = 2 ⋅3770467.

It can be written as a sum of positive squares in 2 ways, for example, as 3182656 + 1207801 = 1784^2 + 1099^2 .

It is a cyclic number.

It is not a de Polignac number, because 4390457 - 2² = 4390453 is a prime.

It is a super-2 number, since 2×4390457² = 38552225337698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4390453) 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 3 ways as a sum of consecutive naturals, for example, 59294 + ... + 59367.

It is an arithmetic number, because the mean of its divisors is an integer number (1127289).

Almost surely, 2^4390457 is an apocalyptic number.

It is an amenable number.

4390457 is a deficient number, since it is larger than the sum of its proper divisors (118699).

4390457 is a wasteful number, since it uses less digits than its factorization.

4390457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118698.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 4390457 is about 2095.3417382375. The cubic root of 4390457 is about 163.7457019636.

The spelling of 4390457 in words is "four million, three hundred ninety thousand, four hundred fifty-seven".