133878356 has 6 divisors (see below), whose sum is σ = 234287130. Its totient is φ = 66939176.

The previous prime is 133878323. The next prime is 133878361. The reversal of 133878356 is 653878331.

It can be written as a sum of positive squares in only one way, i.e., 133864900 + 13456 = 11570^2 + 116^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16734791 + ... + 16734798.

It is an arithmetic number, because the mean of its divisors is an integer number (39047855).

Almost surely, 2^133878356 is an apocalyptic number.

It is an amenable number.

133878356 is a deficient number, since it is larger than the sum of its proper divisors (100408774).

133878356 is a wasteful number, since it uses less digits than its factorization.

133878356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33469593 (or 33469591 counting only the distinct ones).

The product of its digits is 362880, while the sum is 44.

The square root of 133878356 is about 11570.5814892770. The cubic root of 133878356 is about 511.5681019610.

The spelling of 133878356 in words is "one hundred thirty-three million, eight hundred seventy-eight thousand, three hundred fifty-six".