7138458 has 12 divisors (see below), whose sum is σ = 15466698. Its totient is φ = 2379480.

The previous prime is 7138409. The next prime is 7138489. The reversal of 7138458 is 8548317.

It can be written as a sum of positive squares in only one way, i.e., 6487209 + 651249 = 2547^2 + 807^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 198273 + ... + 198308.

Almost surely, 2^7138458 is an apocalyptic number.

7138458 is an abundant number, since it is smaller than the sum of its proper divisors (8328240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7138458 is a wasteful number, since it uses less digits than its factorization.

7138458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396589 (or 396586 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 7138458 is about 2671.7892880989. The cubic root of 7138458 is about 192.5461338801.

The spelling of 7138458 in words is "seven million, one hundred thirty-eight thousand, four hundred fifty-eight".