1235828520 has 48 divisors (see below), whose sum is σ = 4016443860. Its totient is φ = 329554176.

The previous prime is 1235828513. The next prime is 1235828537. The reversal of 1235828520 is 258285321.

1235828520 is a `hidden beast` number, since 1 + 2 + 358 + 285 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1203951204 + 31877316 = 34698^2 + 5646^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1716069 + ... + 1716788.

Almost surely, 2^1235828520 is an apocalyptic number.

1235828520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1235828520 is an abundant number, since it is smaller than the sum of its proper divisors (2780615340).

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

1235828520 is a wasteful number, since it uses less digits than its factorization.

1235828520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3432874 (or 3432867 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 1235828520 is about 35154.3527888084. The cubic root of 1235828520 is about 1073.1309928968.

The spelling of 1235828520 in words is "one billion, two hundred thirty-five million, eight hundred twenty-eight thousand, five hundred twenty".