133977528 has 24 divisors (see below), whose sum is σ = 362856000. Its totient is φ = 44659152.

The previous prime is 133977517. The next prime is 133977539. The reversal of 133977528 is 825779331.

It is a happy number.

133977528 is a `hidden beast` number, since 1 + 33 + 97 + 7 + 528 = 666.

It is an interprime number because it is at equal distance from previous prime (133977517) and next prime (133977539).

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 930328 + ... + 930471.

It is an arithmetic number, because the mean of its divisors is an integer number (15119000).

Almost surely, 2^133977528 is an apocalyptic number.

133977528 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

133977528 is an abundant number, since it is smaller than the sum of its proper divisors (228878472).

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

133977528 is a wasteful number, since it uses less digits than its factorization.

133977528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860811 (or 1860804 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 133977528 is about 11574.8662195293. The cubic root of 133977528 is about 511.6943875220.

The spelling of 133977528 in words is "one hundred thirty-three million, nine hundred seventy-seven thousand, five hundred twenty-eight".