136216404 has 30 divisors (see below), whose sum is σ = 356097434. Its totient is φ = 45405360.

The previous prime is 136216361. The next prime is 136216417. The reversal of 136216404 is 404612631.

136216404 is a `hidden beast` number, since 13 + 6 + 2 + 1 + 640 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 132296004 + 3920400 = 11502^2 + 1980^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 209887 + ... + 210534.

Almost surely, 2^136216404 is an apocalyptic number.

It is an amenable number.

136216404 is an abundant number, since it is smaller than the sum of its proper divisors (219881030).

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

136216404 is a wasteful number, since it uses less digits than its factorization.

136216404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420437 (or 420426 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 136216404 is about 11671.1783466795. The cubic root of 136216404 is about 514.5289361451.

It can be divided in two parts, 1362 and 16404, that added together give a triangular number (17766 = T₁₈₈).

The spelling of 136216404 in words is "one hundred thirty-six million, two hundred sixteen thousand, four hundred four".