7138308 has 36 divisors (see below), whose sum is σ = 17238480. Its totient is φ = 2298960.

The previous prime is 7138297. The next prime is 7138309. The reversal of 7138308 is 8038317.

It is a super-2 number, since 2×7138308² = 101910882205728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7138309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11223 + ... + 11841.

Almost surely, 2^7138308 is an apocalyptic number.

It is an amenable number.

7138308 is an abundant number, since it is smaller than the sum of its proper divisors (10100172).

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

7138308 is a wasteful number, since it uses less digits than its factorization.

7138308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688 (or 655 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 7138308 is about 2671.7612168755. The cubic root of 7138308 is about 192.5447852172.

Subtracting 7138308 from its reverse (8038317), we obtain a palindrome (900009).

The spelling of 7138308 in words is "seven million, one hundred thirty-eight thousand, three hundred eight".