133653428 has 12 divisors (see below), whose sum is σ = 234256260. Its totient is φ = 66723072.

The previous prime is 133653427. The next prime is 133653449. The reversal of 133653428 is 824356331.

It can be written as a sum of positive squares in 2 ways, for example, as 18992164 + 114661264 = 4358^2 + 10708^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133653427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22973 + ... + 28196.

It is an arithmetic number, because the mean of its divisors is an integer number (19521355).

Almost surely, 2^133653428 is an apocalyptic number.

It is an amenable number.

133653428 is a deficient number, since it is larger than the sum of its proper divisors (100602832).

133653428 is a wasteful number, since it uses less digits than its factorization.

133653428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51826 (or 51824 counting only the distinct ones).

The product of its digits is 51840, while the sum is 35.

The square root of 133653428 is about 11560.8575806469. The cubic root of 133653428 is about 511.2814474830.

The spelling of 133653428 in words is "one hundred thirty-three million, six hundred fifty-three thousand, four hundred twenty-eight".