427171728 has 20 divisors (see below), whose sum is σ = 1103527088. Its totient is φ = 142390560.

The previous prime is 427171727. The next prime is 427171729. The reversal of 427171728 is 827171724.

It is an interprime number because it is at equal distance from previous prime (427171727) and next prime (427171729).

It is a super-3 number, since 3×427171728³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (427171727) 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, 4449658 + ... + 4449753.

Almost surely, 2^427171728 is an apocalyptic number.

427171728 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

427171728 is an abundant number, since it is smaller than the sum of its proper divisors (676355360).

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

427171728 is a wasteful number, since it uses less digits than its factorization.

427171728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8899422 (or 8899416 counting only the distinct ones).

The product of its digits is 43904, while the sum is 39.

The square root of 427171728 is about 20668.1331522709. The cubic root of 427171728 is about 753.1257565415.

The spelling of 427171728 in words is "four hundred twenty-seven million, one hundred seventy-one thousand, seven hundred twenty-eight".