427990 has 16 divisors (see below), whose sum is σ = 778752. Its totient is φ = 169344.

The previous prime is 427969. The next prime is 427991. The reversal of 427990 is 99724.

427990 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427991) 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 7 ways as a sum of consecutive naturals, for example, 1102 + ... + 1438.

It is an arithmetic number, because the mean of its divisors is an integer number (48672).

2⁴²⁷⁹⁹⁰ is an apocalyptic number.

427990 is a deficient number, since it is larger than the sum of its proper divisors (350762).

427990 is a wasteful number, since it uses less digits than its factorization.

427990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 427990 is about 654.2094465842. The cubic root of 427990 is about 75.3606335040.

The spelling of 427990 in words is "four hundred twenty-seven thousand, nine hundred ninety".