1420624240 has 80 divisors (see below), whose sum is σ = 3802560192. Its totient is φ = 483489792.

The previous prime is 1420624229. The next prime is 1420624241. The reversal of 1420624240 is 424260241.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420624241) 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, 67462 + ... + 85978.

Almost surely, 2^1420624240 is an apocalyptic number.

1420624240 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 1420624240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1901280096).

1420624240 is an abundant number, since it is smaller than the sum of its proper divisors (2381935952).

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

1420624240 is a wasteful number, since it uses less digits than its factorization.

1420624240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18674 (or 18668 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 1420624240 is about 37691.1692575330. The cubic root of 1420624240 is about 1124.1555447240.

Adding to 1420624240 its reverse (424260241), we get a palindrome (1844884481).

It can be divided in two parts, 1420624 and 240, that added together give a square (1420864 = 1192²).

The spelling of 1420624240 in words is "one billion, four hundred twenty million, six hundred twenty-four thousand, two hundred forty".