2145440412 has 96 divisors (see below), whose sum is σ = 5730278400. Its totient is φ = 693665856.

The previous prime is 2145440411. The next prime is 2145440417. The reversal of 2145440412 is 2140445412.

2145440412 is a `hidden beast` number, since 214 + 5 + 440 + 4 + 1 + 2 = 666.

It is a super-2 number, since 2×2145440412² = 9205829122885459488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145440411) 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, 1753633 + ... + 1754855.

It is an arithmetic number, because the mean of its divisors is an integer number (59690400).

Almost surely, 2^2145440412 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 2145440412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2865139200).

2145440412 is an abundant number, since it is smaller than the sum of its proper divisors (3584837988).

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

2145440412 is a wasteful number, since it uses less digits than its factorization.

2145440412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1712 (or 1704 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 2145440412 is about 46318.8990801811. The cubic root of 2145440412 is about 1289.7498487366.

Adding to 2145440412 its reverse (2140445412), we get a palindrome (4285885824).

The spelling of 2145440412 in words is "two billion, one hundred forty-five million, four hundred forty thousand, four hundred twelve".