229689157428 has 36 divisors (see below), whose sum is σ = 580642023780. Its totient is φ = 76557926016.

The previous prime is 229689157421. The next prime is 229689157469. The reversal of 229689157428 is 824751986922.

It can be written as a sum of positive squares in 2 ways, for example, as 153403822224 + 76285335204 = 391668^2 + 276198^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229689157421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 352038 + ... + 763746.

It is an arithmetic number, because the mean of its divisors is an integer number (16128945105).

Almost surely, 2^229689157428 is an apocalyptic number.

It is an amenable number.

229689157428 is an abundant number, since it is smaller than the sum of its proper divisors (350952866352).

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

229689157428 is a wasteful number, since it uses less digits than its factorization.

229689157428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427216 (or 427211 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The spelling of 229689157428 in words is "two hundred twenty-nine billion, six hundred eighty-nine million, one hundred fifty-seven thousand, four hundred twenty-eight".