427243428 has 36 divisors (see below), whose sum is σ = 1117219740. Its totient is φ = 137503296.

The previous prime is 427243409. The next prime is 427243429. The reversal of 427243428 is 824342724.

It can be written as a sum of positive squares in 2 ways, for example, as 122810724 + 304432704 = 11082^2 + 17448^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 427243392 and 427243401.

It is not an unprimeable number, because it can be changed into a prime (427243429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 203575 + ... + 205662.

Almost surely, 2^427243428 is an apocalyptic number.

It is an amenable number.

427243428 is an abundant number, since it is smaller than the sum of its proper divisors (689976312).

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

427243428 is a wasteful number, since it uses less digits than its factorization.

427243428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409276 (or 409271 counting only the distinct ones).

The product of its digits is 86016, while the sum is 36.

The square root of 427243428 is about 20669.8676338287. The cubic root of 427243428 is about 753.1678911151.

The spelling of 427243428 in words is "four hundred twenty-seven million, two hundred forty-three thousand, four hundred twenty-eight".