124640380 has 48 divisors (see below), whose sum is σ = 276867360. Its totient is φ = 47001600.

The previous prime is 124640371. The next prime is 124640387. The reversal of 124640380 is 83046421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124640387) 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, 90900 + ... + 92260.

It is an arithmetic number, because the mean of its divisors is an integer number (5768070).

Almost surely, 2^124640380 is an apocalyptic number.

124640380 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 124640380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138433680).

124640380 is an abundant number, since it is smaller than the sum of its proper divisors (152226980).

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

124640380 is a wasteful number, since it uses less digits than its factorization.

124640380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630 (or 1628 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 124640380 is about 11164.2456081905. The cubic root of 124640380 is about 499.5200461026.

The spelling of 124640380 in words is "one hundred twenty-four million, six hundred forty thousand, three hundred eighty".