4451266440 has 128 divisors (see below), whose sum is σ = 15316300800. Its totient is φ = 1148705280.

The previous prime is 4451266399. The next prime is 4451266453. The reversal of 4451266440 is 446621544.

4451266440 is a `hidden beast` number, since 4 + 4 + 5 + 1 + 2 + 6 + 644 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 4451266395 and 4451266404.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32997 + ... + 99956.

It is an arithmetic number, because the mean of its divisors is an integer number (119658600).

Almost surely, 2^4451266440 is an apocalyptic number.

4451266440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4451266440 is an abundant number, since it is smaller than the sum of its proper divisors (10865034360).

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

4451266440 is a wasteful number, since it uses less digits than its factorization.

4451266440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133004 (or 132994 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The square root of 4451266440 is about 66717.8120144838. The cubic root of 4451266440 is about 1644.9821772320.

Adding to 4451266440 its reverse (446621544), we get a palindrome (4897887984).

The spelling of 4451266440 in words is "four billion, four hundred fifty-one million, two hundred sixty-six thousand, four hundred forty".