420091550 has 24 divisors (see below), whose sum is σ = 815345136. Its totient is φ = 160730240.

The previous prime is 420091549. The next prime is 420091561. The reversal of 420091550 is 55190024.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181499 + ... + 183798.

It is an arithmetic number, because the mean of its divisors is an integer number (33972714).

Almost surely, 2^420091550 is an apocalyptic number.

420091550 is a deficient number, since it is larger than the sum of its proper divisors (395253586).

420091550 is a wasteful number, since it uses less digits than its factorization.

420091550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365332 (or 365327 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 420091550 is about 20496.1350015070. The cubic root of 420091550 is about 748.9416479645.

The spelling of 420091550 in words is "four hundred twenty million, ninety-one thousand, five hundred fifty".