220400124 has 48 divisors (see below), whose sum is σ = 591376128. Its totient is φ = 62581248.

The previous prime is 220400123. The next prime is 220400143. The reversal of 220400124 is 421004022.

220400124 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220400123) 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, 5644 + ... + 21740.

It is an arithmetic number, because the mean of its divisors is an integer number (12320336).

Almost surely, 2^220400124 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220400124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295688064).

220400124 is an abundant number, since it is smaller than the sum of its proper divisors (370976004).

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

220400124 is a wasteful number, since it uses less digits than its factorization.

220400124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16274 (or 16272 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 220400124 is about 14845.8790241602. The cubic root of 220400124 is about 604.0468327647.

Adding to 220400124 its reverse (421004022), we get a palindrome (641404146).

The spelling of 220400124 in words is "two hundred twenty million, four hundred thousand, one hundred twenty-four".