420788555 has 8 divisors (see below), whose sum is σ = 550850544. Its totient is φ = 306028000.

The previous prime is 420788551. The next prime is 420788561. The reversal of 420788555 is 555887024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 420788555 - 2² = 420788551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420788551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3825296 + ... + 3825405.

It is an arithmetic number, because the mean of its divisors is an integer number (68856318).

Almost surely, 2^420788555 is an apocalyptic number.

420788555 is a deficient number, since it is larger than the sum of its proper divisors (130061989).

420788555 is a wasteful number, since it uses less digits than its factorization.

420788555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7650717.

The product of its (nonzero) digits is 448000, while the sum is 44.

The square root of 420788555 is about 20513.1312821812. The cubic root of 420788555 is about 749.3556272777.

The spelling of 420788555 in words is "four hundred twenty million, seven hundred eighty-eight thousand, five hundred fifty-five".