420780786 has 32 divisors (see below), whose sum is σ = 871819200. Its totient is φ = 135294720.

The previous prime is 420780779. The next prime is 420780797. The reversal of 420780786 is 687087024.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12285 + ... + 31503.

It is an arithmetic number, because the mean of its divisors is an integer number (27244350).

Almost surely, 2^420780786 is an apocalyptic number.

420780786 is an abundant number, since it is smaller than the sum of its proper divisors (451038414).

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

420780786 is a wasteful number, since it uses less digits than its factorization.

420780786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19354.

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 420780786 is about 20512.9419148010. The cubic root of 420780786 is about 749.3510154763.

The spelling of 420780786 in words is "four hundred twenty million, seven hundred eighty thousand, seven hundred eighty-six".