420138148 has 18 divisors (see below), whose sum is σ = 768602534. Its totient is φ = 200934624.

The previous prime is 420138101. The next prime is 420138151. The reversal of 420138148 is 841831024.

It can be written as a sum of positive squares in only one way, i.e., 415262884 + 4875264 = 20378^2 + 2208^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 97161 + ... + 101392.

Almost surely, 2^420138148 is an apocalyptic number.

It is an amenable number.

420138148 is a deficient number, since it is larger than the sum of its proper divisors (348464386).

420138148 is a wasteful number, since it uses less digits than its factorization.

420138148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198603 (or 198578 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 420138148 is about 20497.2717208901. The cubic root of 420138148 is about 748.9693386688.

The spelling of 420138148 in words is "four hundred twenty million, one hundred thirty-eight thousand, one hundred forty-eight".