427873728 has 28 divisors (see below), whose sum is σ = 1132083080. Its totient is φ = 142624512.

The previous prime is 427873727. The next prime is 427873729. The reversal of 427873728 is 827378724.

It is an interprime number because it is at equal distance from previous prime (427873727) and next prime (427873729).

It is a super-2 number, since 2×427873728² = 366151854225235968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427873727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1114063 + ... + 1114446.

Almost surely, 2^427873728 is an apocalyptic number.

427873728 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

427873728 is an abundant number, since it is smaller than the sum of its proper divisors (704209352).

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

427873728 is a wasteful number, since it uses less digits than its factorization.

427873728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228524 (or 2228514 counting only the distinct ones).

The product of its digits is 1053696, while the sum is 48.

The square root of 427873728 is about 20685.1088467042. The cubic root of 427873728 is about 753.5380848064.

The spelling of 427873728 in words is "four hundred twenty-seven million, eight hundred seventy-three thousand, seven hundred twenty-eight".