135897228 has 36 divisors (see below), whose sum is σ = 347664408. Its totient is φ = 44752320.

The previous prime is 135897221. The next prime is 135897233. The reversal of 135897228 is 822798531.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (135897221) 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, 19753 + ... + 25728.

Almost surely, 2^135897228 is an apocalyptic number.

135897228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

135897228 is an abundant number, since it is smaller than the sum of its proper divisors (211767180).

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

135897228 is a wasteful number, since it uses less digits than its factorization.

135897228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45574 (or 45569 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 135897228 is about 11657.4966437911. The cubic root of 135897228 is about 514.1267483554.

The spelling of 135897228 in words is "one hundred thirty-five million, eight hundred ninety-seven thousand, two hundred twenty-eight".