420988 has 24 divisors (see below), whose sum is σ = 804384. Its totient is φ = 192000.

The previous prime is 420977. The next prime is 420997. The reversal of 420988 is 889024.

It is a super-2 number, since 2×420988² = 354461792288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2713 + ... + 2863.

It is an arithmetic number, because the mean of its divisors is an integer number (33516).

2⁴²⁰⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

420988 is a deficient number, since it is larger than the sum of its proper divisors (383396).

420988 is a wasteful number, since it uses less digits than its factorization.

420988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 420988 is about 648.8358806355. The cubic root of 420988 is about 74.9474001557.

The spelling of 420988 in words is "four hundred twenty thousand, nine hundred eighty-eight".