427687785 has 48 divisors (see below), whose sum is σ = 897077376. Its totient is φ = 184011264.

The previous prime is 427687781. The next prime is 427687787. The reversal of 427687785 is 587786724.

It is a happy number.

It is not a de Polignac number, because 427687785 - 2² = 427687781 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (427687781) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34579 + ... + 45288.

It is an arithmetic number, because the mean of its divisors is an integer number (18689112).

Almost surely, 2^427687785 is an apocalyptic number.

427687785 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

427687785 is an abundant number, since it is smaller than the sum of its proper divisors (469389591).

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

427687785 is a wasteful number, since it uses less digits than its factorization.

427687785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79902 (or 79899 counting only the distinct ones).

The product of its digits is 5268480, while the sum is 54.

The square root of 427687785 is about 20680.6137481459. The cubic root of 427687785 is about 753.4289128517.

The spelling of 427687785 in words is "four hundred twenty-seven million, six hundred eighty-seven thousand, seven hundred eighty-five".