420143284 has 12 divisors (see below), whose sum is σ = 802091808. Its totient is φ = 190974200.

The previous prime is 420143267. The next prime is 420143303. The reversal of 420143284 is 482341024.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4774312 + ... + 4774399.

It is an arithmetic number, because the mean of its divisors is an integer number (66840984).

Almost surely, 2^420143284 is an apocalyptic number.

420143284 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

420143284 is a deficient number, since it is larger than the sum of its proper divisors (381948524).

420143284 is a wasteful number, since it uses less digits than its factorization.

420143284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9548726 (or 9548724 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 420143284 is about 20497.3970054736. The cubic root of 420143284 is about 748.9723905942.

The spelling of 420143284 in words is "four hundred twenty million, one hundred forty-three thousand, two hundred eighty-four".