123064640 has 28 divisors (see below), whose sum is σ = 293048436. Its totient is φ = 49225728.

The previous prime is 123064609. The next prime is 123064679. The reversal of 123064640 is 46460321.

It can be written as a sum of positive squares in 2 ways, for example, as 12730624 + 110334016 = 3568^2 + 10504^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191969 + ... + 192608.

Almost surely, 2^123064640 is an apocalyptic number.

123064640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123064640 is an abundant number, since it is smaller than the sum of its proper divisors (169983796).

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

123064640 is an equidigital number, since it uses as much as digits as its factorization.

123064640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384594 (or 384584 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 123064640 is about 11093.4503198960. The cubic root of 123064640 is about 497.4060864959.

The spelling of 123064640 in words is "one hundred twenty-three million, sixty-four thousand, six hundred forty".