1578428424 has 64 divisors (see below), whose sum is σ = 4392273600. Its totient is φ = 525212928.

The previous prime is 1578428413. The next prime is 1578428431. The reversal of 1578428424 is 4248248751.

It is a super-2 number, since 2×1578428424² = 4982872579382247552, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1578428424.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121927 + ... + 134249.

It is an arithmetic number, because the mean of its divisors is an integer number (68629275).

Almost surely, 2^1578428424 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 1578428424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2196136800).

1578428424 is an abundant number, since it is smaller than the sum of its proper divisors (2813845176).

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

1578428424 is a wasteful number, since it uses less digits than its factorization.

1578428424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12931 (or 12921 counting only the distinct ones).

The product of its digits is 573440, while the sum is 45.

The square root of 1578428424 is about 39729.4402678920. The cubic root of 1578428424 is about 1164.3269885893.

The spelling of 1578428424 in words is "one billion, five hundred seventy-eight million, four hundred twenty-eight thousand, four hundred twenty-four".