427781740 has 12 divisors (see below), whose sum is σ = 898341696. Its totient is φ = 171112688.

The previous prime is 427781701. The next prime is 427781747. The reversal of 427781740 is 47187724.

It is a junction number, because it is equal to n+sod(n) for n = 427781693 and 427781702.

It is not an unprimeable number, because it can be changed into a prime (427781747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10694524 + ... + 10694563.

It is an arithmetic number, because the mean of its divisors is an integer number (74861808).

Almost surely, 2^427781740 is an apocalyptic number.

It is an amenable number.

427781740 is an abundant number, since it is smaller than the sum of its proper divisors (470559956).

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

427781740 is a wasteful number, since it uses less digits than its factorization.

427781740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21389096 (or 21389094 counting only the distinct ones).

The product of its (nonzero) digits is 87808, while the sum is 40.

The square root of 427781740 is about 20682.8851952526. The cubic root of 427781740 is about 753.4840802214.

The spelling of 427781740 in words is "four hundred twenty-seven million, seven hundred eighty-one thousand, seven hundred forty".