420129998 has 8 divisors (see below), whose sum is σ = 632810640. Its totient is φ = 209193120.

The previous prime is 420129967. The next prime is 420130001. The reversal of 420129998 is 899921024.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 435338 + ... + 436301.

It is an arithmetic number, because the mean of its divisors is an integer number (79101330).

Almost surely, 2^420129998 is an apocalyptic number.

420129998 is a deficient number, since it is larger than the sum of its proper divisors (212680642).

420129998 is a wasteful number, since it uses less digits than its factorization.

420129998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871882.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 420129998 is about 20497.0729129796. The cubic root of 420129998 is about 748.9644957065.

The spelling of 420129998 in words is "four hundred twenty million, one hundred twenty-nine thousand, nine hundred ninety-eight".