124643640 has 64 divisors (see below), whose sum is σ = 407928960. Its totient is φ = 30216320.

The previous prime is 124643611. The next prime is 124643641. The reversal of 124643640 is 46346421.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 124643598 and 124643607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124643641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45894 + ... + 48533.

It is an arithmetic number, because the mean of its divisors is an integer number (6373890).

Almost surely, 2^124643640 is an apocalyptic number.

124643640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

124643640 is an abundant number, since it is smaller than the sum of its proper divisors (283285320).

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

124643640 is a wasteful number, since it uses less digits than its factorization.

124643640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94452 (or 94448 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 124643640 is about 11164.3916090399. The cubic root of 124643640 is about 499.5244010881.

The spelling of 124643640 in words is "one hundred twenty-four million, six hundred forty-three thousand, six hundred forty".