1420886640 has 80 divisors (see below), whose sum is σ = 4596277248. Its totient is φ = 362427648.

The previous prime is 1420886591. The next prime is 1420886641. The reversal of 1420886640 is 466880241.

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 (1420886641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123184 + ... + 134223.

Almost surely, 2^1420886640 is an apocalyptic number.

1420886640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1420886640 is an abundant number, since it is smaller than the sum of its proper divisors (3175390608).

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

1420886640 is a wasteful number, since it uses less digits than its factorization.

1420886640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257446 (or 257440 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 1420886640 is about 37694.6500182718. The cubic root of 1420886640 is about 1124.2247537958.

The spelling of 1420886640 in words is "one billion, four hundred twenty million, eight hundred eighty-six thousand, six hundred forty".