1958128 has 40 divisors (see below), whose sum is σ = 4205088. Its totient is φ = 878592.

The previous prime is 1958107. The next prime is 1958137. The reversal of 1958128 is 8218591.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 1958093 and 1958102.

It is a congruent number.

It is an unprimeable number.

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, 6100 + ... + 6412.

2^1958128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1958128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2102544).

1958128 is an abundant number, since it is smaller than the sum of its proper divisors (2246960).

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

1958128 is a wasteful number, since it uses less digits than its factorization.

1958128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361 (or 355 counting only the distinct ones).

The product of its digits is 5760, while the sum is 34.

The square root of 1958128 is about 1399.3312688567. The cubic root of 1958128 is about 125.1066396647.

The spelling of 1958128 in words is "one million, nine hundred fifty-eight thousand, one hundred twenty-eight".