1420334640 has 240 divisors, whose sum is σ = 5013964800. Its totient is φ = 359631360.

The previous prime is 1420334633. The next prime is 1420334701. The reversal of 1420334640 is 464330241.

1420334640 is a `hidden beast` number, since 14 + 2 + 0 + 3 + 3 + 4 + 640 = 666.

1420334640 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (240).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3295225 + ... + 3295655.

It is an arithmetic number, because the mean of its divisors is an integer number (20891520).

Almost surely, 2^1420334640 is an apocalyptic number.

1420334640 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 1420334640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2506982400).

1420334640 is an abundant number, since it is smaller than the sum of its proper divisors (3593630160).

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

1420334640 is a wasteful number, since it uses less digits than its factorization.

1420334640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672 (or 663 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 1420334640 is about 37687.3273130372. The cubic root of 1420334640 is about 1124.0791516471.

Adding to 1420334640 its reverse (464330241), we get a palindrome (1884664881).

The spelling of 1420334640 in words is "one billion, four hundred twenty million, three hundred thirty-four thousand, six hundred forty".