7148889 has 12 divisors (see below), whose sum is σ = 11265072. Its totient is φ = 4332600.

The previous prime is 7148849. The next prime is 7148893. The reversal of 7148889 is 9888417.

It is not a de Polignac number, because 7148889 - 2⁸ = 7148633 is a prime.

It is a super-2 number, since 2×7148889² = 102213227868642, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7148809) 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, 36007 + ... + 36204.

It is an arithmetic number, because the mean of its divisors is an integer number (938756).

Almost surely, 2^7148889 is an apocalyptic number.

It is an amenable number.

7148889 is a deficient number, since it is larger than the sum of its proper divisors (4116183).

7148889 is a wasteful number, since it uses less digits than its factorization.

7148889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72228 (or 72225 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 7148889 is about 2673.7406381323. The cubic root of 7148889 is about 192.6398736038.

The spelling of 7148889 in words is "seven million, one hundred forty-eight thousand, eight hundred eighty-nine".