1427447520 has 144 divisors (see below), whose sum is σ = 4883965632. Its totient is φ = 379653120.

The previous prime is 1427447509. The next prime is 1427447521. The reversal of 1427447520 is 257447241.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1427447521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 665650 + ... + 667790.

It is an arithmetic number, because the mean of its divisors is an integer number (33916428).

Almost surely, 2^1427447520 is an apocalyptic number.

1427447520 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 1427447520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2441982816).

1427447520 is an abundant number, since it is smaller than the sum of its proper divisors (3456518112).

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

1427447520 is a wasteful number, since it uses less digits than its factorization.

1427447520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2625 (or 2614 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 36.

The square root of 1427447520 is about 37781.5764626094. The cubic root of 1427447520 is about 1125.9524497039.

The spelling of 1427447520 in words is "one billion, four hundred twenty-seven million, four hundred forty-seven thousand, five hundred twenty".