7149389678 has 32 divisors (see below), whose sum is σ = 11879457408. Its totient is φ = 3212492800.

The previous prime is 7149389629. The next prime is 7149389699. The reversal of 7149389678 is 8769839417.

It is a super-2 number, since 2×7149389678² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7149389678.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10958 + ... + 120078.

It is an arithmetic number, because the mean of its divisors is an integer number (371233044).

Almost surely, 2^7149389678 is an apocalyptic number.

7149389678 is a deficient number, since it is larger than the sum of its proper divisors (4730067730).

7149389678 is a wasteful number, since it uses less digits than its factorization.

7149389678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109228.

The product of its digits is 18289152, while the sum is 62.

The square root of 7149389678 is about 84554.0636397802. The cubic root of 7149389678 is about 1926.4437072660.

The spelling of 7149389678 in words is "seven billion, one hundred forty-nine million, three hundred eighty-nine thousand, six hundred seventy-eight".