720055420 has 24 divisors (see below), whose sum is σ = 1728133344. Its totient is φ = 246876096.

The previous prime is 720055397. The next prime is 720055421. The reversal of 720055420 is 24550027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720055421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2571487 + ... + 2571766.

It is an arithmetic number, because the mean of its divisors is an integer number (72005556).

Almost surely, 2^720055420 is an apocalyptic number.

720055420 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

720055420 is an abundant number, since it is smaller than the sum of its proper divisors (1008077924).

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

720055420 is a wasteful number, since it uses less digits than its factorization.

720055420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5143269 (or 5143267 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 720055420 is about 26833.8484008537. The cubic root of 720055420 is about 896.3039449669.

The spelling of 720055420 in words is "seven hundred twenty million, fifty-five thousand, four hundred twenty".