420193878 has 16 divisors (see below), whose sum is σ = 905033136. Its totient is φ = 129290400.

The previous prime is 420193859. The next prime is 420193883. The reversal of 420193878 is 878391024.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2693473 + ... + 2693628.

It is an arithmetic number, because the mean of its divisors is an integer number (56564571).

Almost surely, 2^420193878 is an apocalyptic number.

420193878 is an abundant number, since it is smaller than the sum of its proper divisors (484839258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420193878 is a wasteful number, since it uses less digits than its factorization.

420193878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5387119.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 420193878 is about 20498.6311250288. The cubic root of 420193878 is about 749.0024533447.

The spelling of 420193878 in words is "four hundred twenty million, one hundred ninety-three thousand, eight hundred seventy-eight".