124672640 has 64 divisors (see below), whose sum is σ = 301764960. Its totient is φ = 49247232.

The previous prime is 124672633. The next prime is 124672649. The reversal of 124672640 is 46276421.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 124672597 and 124672606.

It is not an unprimeable number, because it can be changed into a prime (124672649) 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, 51947 + ... + 54293.

Almost surely, 2^124672640 is an apocalyptic number.

124672640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 124672640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150882480).

124672640 is an abundant number, since it is smaller than the sum of its proper divisors (177092320).

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

124672640 is an equidigital number, since it uses as much as digits as its factorization.

124672640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449 (or 2437 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 124672640 is about 11165.6903055745. The cubic root of 124672640 is about 499.5631384151.

The spelling of 124672640 in words is "one hundred twenty-four million, six hundred seventy-two thousand, six hundred forty".