2400402312 has 192 divisors, whose sum is σ = 8582371200. Its totient is φ = 586782720.

The previous prime is 2400402289. The next prime is 2400402313. The reversal of 2400402312 is 2132040042.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2400402313) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 81514 + ... + 106982.

It is an arithmetic number, because the mean of its divisors is an integer number (44699850).

Almost surely, 2^2400402312 is an apocalyptic number.

2400402312 is a gapful number since it is divisible by the number (22) 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 2400402312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4291185600).

2400402312 is an abundant number, since it is smaller than the sum of its proper divisors (6181968888).

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

2400402312 is a wasteful number, since it uses less digits than its factorization.

2400402312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25516 (or 25509 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 2400402312 is about 48993.9007632583. The cubic root of 2400402312 is about 1338.9407073481.

Adding to 2400402312 its reverse (2132040042), we get a palindrome (4532442354).

The spelling of 2400402312 in words is "two billion, four hundred million, four hundred two thousand, three hundred twelve".