427655920 has 20 divisors (see below), whose sum is σ = 994300200. Its totient is φ = 171062336.

The previous prime is 427655909. The next prime is 427655929. The reversal of 427655920 is 29556724.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×427655920² = 365779171822092800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427655929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2672770 + ... + 2672929.

It is an arithmetic number, because the mean of its divisors is an integer number (49715010).

Almost surely, 2^427655920 is an apocalyptic number.

427655920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

427655920 is an abundant number, since it is smaller than the sum of its proper divisors (566644280).

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

427655920 is a wasteful number, since it uses less digits than its factorization.

427655920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5345712 (or 5345706 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 427655920 is about 20679.8433262924. The cubic root of 427655920 is about 753.4102009085.

The spelling of 427655920 in words is "four hundred twenty-seven million, six hundred fifty-five thousand, nine hundred twenty".