1447332840 has 128 divisors (see below), whose sum is σ = 4832784000. Its totient is φ = 385288704.

The previous prime is 1447332839. The next prime is 1447332889. The reversal of 1447332840 is 482337441.

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 = 1447332795 and 1447332804.

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, 1218727 + ... + 1219913.

It is an arithmetic number, because the mean of its divisors is an integer number (37756125).

Almost surely, 2^1447332840 is an apocalyptic number.

1447332840 is a gapful number since it is divisible by the number (10) 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 1447332840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2416392000).

1447332840 is an abundant number, since it is smaller than the sum of its proper divisors (3385451160).

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

1447332840 is a wasteful number, since it uses less digits than its factorization.

1447332840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2336 (or 2326 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 1447332840 is about 38043.8278831140. The cubic root of 1447332840 is about 1131.1567865159.

The spelling of 1447332840 in words is "one billion, four hundred forty-seven million, three hundred thirty-two thousand, eight hundred forty".