124678840 has 128 divisors (see below), whose sum is σ = 335301120. Its totient is φ = 41126400.

The previous prime is 124678823. The next prime is 124678847. The reversal of 124678840 is 48876421.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 124678793 and 124678802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124678847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 405967 + ... + 406273.

It is an arithmetic number, because the mean of its divisors is an integer number (2619540).

Almost surely, 2^124678840 is an apocalyptic number.

124678840 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 124678840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167650560).

124678840 is an abundant number, since it is smaller than the sum of its proper divisors (210622280).

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

124678840 is a wasteful number, since it uses less digits than its factorization.

124678840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413 (or 409 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 124678840 is about 11165.9679383384. The cubic root of 124678840 is about 499.5714194090.

The spelling of 124678840 in words is "one hundred twenty-four million, six hundred seventy-eight thousand, eight hundred forty".