135997828 has 12 divisors (see below), whose sum is σ = 238418460. Its totient is φ = 67878272.

The previous prime is 135997819. The next prime is 135997867. The reversal of 135997828 is 828799531.

It can be written as a sum of positive squares in 2 ways, for example, as 52969284 + 83028544 = 7278^2 + 9112^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27601 + ... + 32152.

It is an arithmetic number, because the mean of its divisors is an integer number (19868205).

Almost surely, 2^135997828 is an apocalyptic number.

135997828 is the 6234-th centered heptagonal number.

It is an amenable number.

135997828 is a deficient number, since it is larger than the sum of its proper divisors (102420632).

135997828 is a wasteful number, since it uses less digits than its factorization.

135997828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60326 (or 60324 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 52.

The square root of 135997828 is about 11661.8106655871. The cubic root of 135997828 is about 514.2535804584.

The spelling of 135997828 in words is "one hundred thirty-five million, nine hundred ninety-seven thousand, eight hundred twenty-eight".