52440123400 has 144 divisors (see below), whose sum is σ = 145289489940. Its totient is φ = 17540812800.

The previous prime is 52440123391. The next prime is 52440123401. The reversal of 52440123400 is 432104425.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 11282263524 + 41157859876 = 106218^2 + 202874^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (52440123401) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 336544 + ... + 467056.

Almost surely, 2^52440123400 is an apocalyptic number.

52440123400 is a gapful number since it is divisible by the number (50) 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 52440123400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72644744970).

52440123400 is an abundant number, since it is smaller than the sum of its proper divisors (92849366540).

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

52440123400 is a wasteful number, since it uses less digits than its factorization.

52440123400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130584 (or 130568 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 52440123400 its reverse (432104425), we get a palindrome (52872227825).

The spelling of 52440123400 in words is "fifty-two billion, four hundred forty million, one hundred twenty-three thousand, four hundred".