136649428 has 12 divisors (see below), whose sum is σ = 243190080. Its totient is φ = 67166552.

The previous prime is 136649419. The next prime is 136649437. The reversal of 136649428 is 824946631.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (136649419) and next prime (136649437).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289276 + ... + 289747.

It is an arithmetic number, because the mean of its divisors is an integer number (20265840).

Almost surely, 2^136649428 is an apocalyptic number.

It is an amenable number.

136649428 is a deficient number, since it is larger than the sum of its proper divisors (106540652).

136649428 is a wasteful number, since it uses less digits than its factorization.

136649428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579086 (or 579084 counting only the distinct ones).

The product of its digits is 248832, while the sum is 43.

The square root of 136649428 is about 11689.7146244038. The cubic root of 136649428 is about 515.0735785783.

The spelling of 136649428 in words is "one hundred thirty-six million, six hundred forty-nine thousand, four hundred twenty-eight".