1975428 has 120 divisors (see below), whose sum is σ = 6450752. Its totient is φ = 513216.

The previous prime is 1975427. The next prime is 1975439. The reversal of 1975428 is 8245791.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1975392 and 1975401.

It is not an unprimeable number, because it can be changed into a prime (1975423) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 29451 + ... + 29517.

2^1975428 is an apocalyptic number.

1975428 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 1975428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3225376).

1975428 is an abundant number, since it is smaller than the sum of its proper divisors (4475324).

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

1975428 is a wasteful number, since it uses less digits than its factorization.

1975428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 92 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 1975428 is about 1405.4991995729. The cubic root of 1975428 is about 125.4739976711.

It can be divided in two parts, 197 and 5428, that added together give a square (5625 = 75²).

The spelling of 1975428 in words is "one million, nine hundred seventy-five thousand, four hundred twenty-eight".