123989270 has 16 divisors (see below), whose sum is σ = 223311168. Its totient is φ = 49566720.

The previous prime is 123989263. The next prime is 123989287. The reversal of 123989270 is 72989321.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25430 + ... + 29910.

It is an arithmetic number, because the mean of its divisors is an integer number (13956948).

Almost surely, 2^123989270 is an apocalyptic number.

123989270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123989270 is a deficient number, since it is larger than the sum of its proper divisors (99321898).

123989270 is a wasteful number, since it uses less digits than its factorization.

123989270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7255.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 123989270 is about 11135.0469240143. The cubic root of 123989270 is about 498.6487113278.

It can be divided in two parts, 1239 and 89270, that added together give a palindrome (90509).

The spelling of 123989270 in words is "one hundred twenty-three million, nine hundred eighty-nine thousand, two hundred seventy".