427621785 has 16 divisors (see below), whose sum is σ = 684487104. Its totient is φ = 227967552.

The previous prime is 427621751. The next prime is 427621807. The reversal of 427621785 is 587126724.

It is not a de Polignac number, because 427621785 - 2⁶ = 427621721 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 42939 + ... + 51951.

It is an arithmetic number, because the mean of its divisors is an integer number (42780444).

Almost surely, 2^427621785 is an apocalyptic number.

It is an amenable number.

427621785 is a deficient number, since it is larger than the sum of its proper divisors (256865319).

427621785 is a wasteful number, since it uses less digits than its factorization.

427621785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12184.

The product of its digits is 188160, while the sum is 42.

The square root of 427621785 is about 20679.0179892566. The cubic root of 427621785 is about 753.3901549321.

The spelling of 427621785 in words is "four hundred twenty-seven million, six hundred twenty-one thousand, seven hundred eighty-five".