1420427440 has 80 divisors (see below), whose sum is σ = 3418281216. Its totient is φ = 548352000.

The previous prime is 1420427387. The next prime is 1420427443. The reversal of 1420427440 is 447240241.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1420427440² = 4035228224609907200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1420427399 and 1420427408.

It is not an unprimeable number, because it can be changed into a prime (1420427443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1490004 + ... + 1490956.

Almost surely, 2^1420427440 is an apocalyptic number.

1420427440 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 1420427440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1709140608).

1420427440 is an abundant number, since it is smaller than the sum of its proper divisors (1997853776).

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

1420427440 is a wasteful number, since it uses less digits than its factorization.

1420427440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598 (or 1592 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 28.

The square root of 1420427440 is about 37688.5584760150. The cubic root of 1420427440 is about 1124.1036323271.

Adding to 1420427440 its reverse (447240241), we get a palindrome (1867667681).

The spelling of 1420427440 in words is "one billion, four hundred twenty million, four hundred twenty-seven thousand, four hundred forty".