1048400028 has 144 divisors (see below), whose sum is σ = 2973210240. Its totient is φ = 309391488.

The previous prime is 1048400027. The next prime is 1048400057. The reversal of 1048400028 is 8200048401.

It is a junction number, because it is equal to n+sod(n) for n = 1048399974 and 1048400010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1048400027) 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 47 ways as a sum of consecutive naturals, for example, 1186875 + ... + 1187757.

Almost surely, 2^1048400028 is an apocalyptic number.

1048400028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1048400028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1486605120).

1048400028 is an abundant number, since it is smaller than the sum of its proper divisors (1924810212).

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

1048400028 is a wasteful number, since it uses less digits than its factorization.

1048400028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008 (or 1003 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 1048400028 is about 32379.0059760951. The cubic root of 1048400028 is about 1015.8798385906.

Adding to 1048400028 its reverse (8200048401), we get a palindrome (9248448429).

The spelling of 1048400028 in words is "one billion, forty-eight million, four hundred thousand, twenty-eight".