420142988 has 6 divisors (see below), whose sum is σ = 735250236. Its totient is φ = 210071492.

The previous prime is 420142979. The next prime is 420142993. The reversal of 420142988 is 889241024.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52517870 + ... + 52517877.

It is an arithmetic number, because the mean of its divisors is an integer number (122541706).

Almost surely, 2^420142988 is an apocalyptic number.

It is an amenable number.

420142988 is a deficient number, since it is larger than the sum of its proper divisors (315107248).

420142988 is a wasteful number, since it uses less digits than its factorization.

420142988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105035751 (or 105035749 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 420142988 is about 20497.3897850434. The cubic root of 420142988 is about 748.9722147051.

The spelling of 420142988 in words is "four hundred twenty million, one hundred forty-two thousand, nine hundred eighty-eight".