2658394 has 4 divisors (see below), whose sum is σ = 3987594. Its totient is φ = 1329196.

The previous prime is 2658391. The next prime is 2658437. The reversal of 2658394 is 4938562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4938562 = 2 ⋅2469281.

It can be written as a sum of positive squares in only one way, i.e., 2576025 + 82369 = 1605^2 + 287^2 .

It is not an unprimeable number, because it can be changed into a prime (2658391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664597 + ... + 664600.

2^2658394 is an apocalyptic number.

2658394 is a deficient number, since it is larger than the sum of its proper divisors (1329200).

2658394 is a wasteful number, since it uses less digits than its factorization.

2658394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329199.

The product of its digits is 51840, while the sum is 37.

The square root of 2658394 is about 1630.4582178026. The cubic root of 2658394 is about 138.5287076603.

The spelling of 2658394 in words is "two million, six hundred fifty-eight thousand, three hundred ninety-four".