28424207402 has 16 divisors (see below), whose sum is σ = 43197992712. Its totient is φ = 14025707520.

The previous prime is 28424207389. The next prime is 28424207411. The reversal of 28424207402 is 20470242482.

It can be written as a sum of positive squares in 4 ways, for example, as 26315652841 + 2108554561 = 162221^2 + 45919^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139049 + ... + 276012.

Almost surely, 2^28424207402 is an apocalyptic number.

28424207402 is a deficient number, since it is larger than the sum of its proper divisors (14773785310).

28424207402 is a wasteful number, since it uses less digits than its factorization.

28424207402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415513.

The product of its (nonzero) digits is 57344, while the sum is 35.

Adding to 28424207402 its reverse (20470242482), we get a palindrome (48894449884).

The spelling of 28424207402 in words is "twenty-eight billion, four hundred twenty-four million, two hundred seven thousand, four hundred two".