420728590 has 64 divisors (see below), whose sum is σ = 837089280. Its totient is φ = 151632000.

The previous prime is 420728579. The next prime is 420728629. The reversal of 420728590 is 95827024.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 358705 + ... + 359875.

It is an arithmetic number, because the mean of its divisors is an integer number (13079520).

Almost surely, 2^420728590 is an apocalyptic number.

420728590 is a deficient number, since it is larger than the sum of its proper divisors (416360690).

420728590 is a wasteful number, since it uses less digits than its factorization.

420728590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 420728590 is about 20511.6696053734. The cubic root of 420728590 is about 749.3200296326.

The spelling of 420728590 in words is "four hundred twenty million, seven hundred twenty-eight thousand, five hundred ninety".