2135228240 has 40 divisors (see below), whose sum is σ = 5135597640. Its totient is φ = 824638976.

The previous prime is 2135228239. The next prime is 2135228243. The reversal of 2135228240 is 428225312.

It can be written as a sum of positive squares in 4 ways, for example, as 885181504 + 1250046736 = 29752^2 + 35356^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2135228243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 457859 + ... + 462498.

It is an arithmetic number, because the mean of its divisors is an integer number (128389941).

Almost surely, 2^2135228240 is an apocalyptic number.

2135228240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2135228240 is an abundant number, since it is smaller than the sum of its proper divisors (3000369400).

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

2135228240 is a wasteful number, since it uses less digits than its factorization.

2135228240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920399 (or 920393 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 2135228240 is about 46208.5299484846. The cubic root of 2135228240 is about 1287.7002150696.

The spelling of 2135228240 in words is "two billion, one hundred thirty-five million, two hundred twenty-eight thousand, two hundred forty".