4145428 has 48 divisors (see below), whose sum is σ = 8918784. Its totient is φ = 1647360.

The previous prime is 4145423. The next prime is 4145459. The reversal of 4145428 is 8245414.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 4145396 and 4145405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4145423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26326 + ... + 26482.

It is an arithmetic number, because the mean of its divisors is an integer number (185808).

Almost surely, 2^4145428 is an apocalyptic number.

4145428 is the 1288-th heptagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4145428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4459392).

4145428 is an abundant number, since it is smaller than the sum of its proper divisors (4773356).

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

4145428 is a wasteful number, since it uses less digits than its factorization.

4145428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 230 counting only the distinct ones).

The product of its digits is 5120, while the sum is 28.

The square root of 4145428 is about 2036.0324162449. The cubic root of 4145428 is about 160.6410221367.

The spelling of 4145428 in words is "four million, one hundred forty-five thousand, four hundred twenty-eight".