36391557 has 8 divisors (see below), whose sum is σ = 48573184. Its totient is φ = 24235488.

The previous prime is 36391541. The next prime is 36391567. The reversal of 36391557 is 75519363.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 36391557 - 2⁴ = 36391541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36391567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2773 + ... + 8970.

It is an arithmetic number, because the mean of its divisors is an integer number (6071648).

Almost surely, 2^36391557 is an apocalyptic number.

It is an amenable number.

36391557 is a deficient number, since it is larger than the sum of its proper divisors (12181627).

36391557 is a wasteful number, since it uses less digits than its factorization.

36391557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12779.

The product of its digits is 85050, while the sum is 39.

The square root of 36391557 is about 6032.5415042087. The cubic root of 36391557 is about 331.3855336205.

The spelling of 36391557 in words is "thirty-six million, three hundred ninety-one thousand, five hundred fifty-seven".