283139478 has 24 divisors (see below), whose sum is σ = 614016000. Its totient is φ = 94295664.

The previous prime is 283139473. The next prime is 283139497. The reversal of 283139478 is 874931382.

It is a super-2 number, since 2×283139478² = 160335928004224968, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (283139473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15723 + ... + 28521.

It is an arithmetic number, because the mean of its divisors is an integer number (25584000).

Almost surely, 2^283139478 is an apocalyptic number.

283139478 is an abundant number, since it is smaller than the sum of its proper divisors (330876522).

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

283139478 is a wasteful number, since it uses less digits than its factorization.

283139478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14036 (or 14033 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 283139478 is about 16826.7488838456. The cubic root of 283139478 is about 656.6492849577.

The spelling of 283139478 in words is "two hundred eighty-three million, one hundred thirty-nine thousand, four hundred seventy-eight".