36091778 has 4 divisors (see below), whose sum is σ = 54137670. Its totient is φ = 18045888.

The previous prime is 36091777. The next prime is 36091787. The reversal of 36091778 is 87719063.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 27699169 + 8392609 = 5263^2 + 2897^2 .

It is not an unprimeable number, because it can be changed into a prime (36091777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9022943 + ... + 9022946.

Almost surely, 2^36091778 is an apocalyptic number.

36091778 is a deficient number, since it is larger than the sum of its proper divisors (18045892).

36091778 is a wasteful number, since it uses less digits than its factorization.

36091778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18045891.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 36091778 is about 6007.6432983325. The cubic root of 36091778 is about 330.4730833314.

The spelling of 36091778 in words is "thirty-six million, ninety-one thousand, seven hundred seventy-eight".