7148638 has 8 divisors (see below), whose sum is σ = 12254832. Its totient is φ = 3063696.

The previous prime is 7148633. The next prime is 7148657. The reversal of 7148638 is 8368417.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×7148638² = 102206050510088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7148597 and 7148606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7148633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255295 + ... + 255322.

It is an arithmetic number, because the mean of its divisors is an integer number (1531854).

Almost surely, 2^7148638 is an apocalyptic number.

7148638 is a deficient number, since it is larger than the sum of its proper divisors (5106194).

7148638 is a wasteful number, since it uses less digits than its factorization.

7148638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510626.

The product of its digits is 32256, while the sum is 37.

The square root of 7148638 is about 2673.6936997345. The cubic root of 7148638 is about 192.6376190262.

The spelling of 7148638 in words is "seven million, one hundred forty-eight thousand, six hundred thirty-eight".