124538640 has 40 divisors (see below), whose sum is σ = 386070528. Its totient is φ = 33210240.

The previous prime is 124538611. The next prime is 124538641. The reversal of 124538640 is 46835421.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (124538641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259216 + ... + 259695.

Almost surely, 2^124538640 is an apocalyptic number.

124538640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

124538640 is an abundant number, since it is smaller than the sum of its proper divisors (261531888).

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

124538640 is a wasteful number, since it uses less digits than its factorization.

124538640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518927 (or 518921 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 124538640 is about 11159.6881676864. The cubic root of 124538640 is about 499.3840949668.

The spelling of 124538640 in words is "one hundred twenty-four million, five hundred thirty-eight thousand, six hundred forty".