228135620340 has 60 divisors (see below), whose sum is σ = 715669895556. Its totient is φ = 60836164992.

The previous prime is 228135620303. The next prime is 228135620357. The reversal of 228135620340 is 43026531822.

228135620340 is a `hidden beast` number, since 2 + 28 + 1 + 3 + 5 + 620 + 3 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 98704045584 + 129431574756 = 314172^2 + 359766^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×228135620340² (a number of 24 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 228135620295 and 228135620304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 70410609 + ... + 70413848.

Almost surely, 2^228135620340 is an apocalyptic number.

228135620340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228135620340 is an abundant number, since it is smaller than the sum of its proper divisors (487534275216).

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

228135620340 is a wasteful number, since it uses less digits than its factorization.

228135620340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140824478 (or 140824467 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 228135620340 in words is "two hundred twenty-eight billion, one hundred thirty-five million, six hundred twenty thousand, three hundred forty".