1042139028 has 48 divisors (see below), whose sum is σ = 2868690944. Its totient is φ = 288148320.

The previous prime is 1042139023. The next prime is 1042139029. The reversal of 1042139028 is 8209312401.

It is a junction number, because it is equal to n+sod(n) for n = 1042138986 and 1042139004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042139023) 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 15 ways as a sum of consecutive naturals, for example, 197500 + ... + 202707.

Almost surely, 2^1042139028 is an apocalyptic number.

It is an amenable number.

1042139028 is an abundant number, since it is smaller than the sum of its proper divisors (1826551916).

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

1042139028 is a wasteful number, since it uses less digits than its factorization.

1042139028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400252 (or 400250 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1042139028 is about 32282.1781792989. The cubic root of 1042139028 is about 1013.8535359494.

The spelling of 1042139028 in words is "one billion, forty-two million, one hundred thirty-nine thousand, twenty-eight".