42789428 has 24 divisors (see below), whose sum is σ = 82845504. Its totient is φ = 19174400.

The previous prime is 42789421. The next prime is 42789431. The reversal of 42789428 is 82498724.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42789421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3725 + ... + 9972.

It is an arithmetic number, because the mean of its divisors is an integer number (3451896).

Almost surely, 2^42789428 is an apocalyptic number.

It is an amenable number.

42789428 is a deficient number, since it is larger than the sum of its proper divisors (40056076).

42789428 is a wasteful number, since it uses less digits than its factorization.

42789428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13783 (or 13781 counting only the distinct ones).

The product of its digits is 258048, while the sum is 44.

The square root of 42789428 is about 6541.3628549409. The cubic root of 42789428 is about 349.7669959380.

The spelling of 42789428 in words is "forty-two million, seven hundred eighty-nine thousand, four hundred twenty-eight".