427656680 has 64 divisors (see below), whose sum is σ = 1053103680. Its totient is φ = 155008000.

The previous prime is 427656667. The next prime is 427656781. The reversal of 427656680 is 86656724.

It is a super-3 number, since 3×427656680³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 151280 + ... + 154080.

It is an arithmetic number, because the mean of its divisors is an integer number (16454745).

Almost surely, 2^427656680 is an apocalyptic number.

427656680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 427656680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (526551840).

427656680 is an abundant number, since it is smaller than the sum of its proper divisors (625447000).

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

427656680 is a wasteful number, since it uses less digits than its factorization.

427656680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3170 (or 3166 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The square root of 427656680 is about 20679.8617016652. The cubic root of 427656680 is about 753.4106472108.

Adding to 427656680 its sum of digits (44), we get a palindrome (427656724).

The spelling of 427656680 in words is "four hundred twenty-seven million, six hundred fifty-six thousand, six hundred eighty".