2078458 has 4 divisors (see below), whose sum is σ = 3117690. Its totient is φ = 1039228.

The previous prime is 2078449. The next prime is 2078473. The reversal of 2078458 is 8548702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1896129 + 182329 = 1377^2 + 427^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 519613 + ... + 519616.

2^2078458 is an apocalyptic number.

2078458 is a deficient number, since it is larger than the sum of its proper divisors (1039232).

2078458 is a wasteful number, since it uses less digits than its factorization.

2078458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039231.

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 2078458 is about 1441.6858187553. The cubic root of 2078458 is about 127.6185338788.

The spelling of 2078458 in words is "two million, seventy-eight thousand, four hundred fifty-eight".