36405779 has 4 divisors (see below), whose sum is σ = 36432000. Its totient is φ = 36379560.

The previous prime is 36405739. The next prime is 36405791. The reversal of 36405779 is 97750463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97750463 = 5101 ⋅19163.

It is a cyclic number.

It is not a de Polignac number, because 36405779 - 2¹² = 36401683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36405739) 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, 10904 + ... + 13845.

It is an arithmetic number, because the mean of its divisors is an integer number (9108000).

Almost surely, 2^36405779 is an apocalyptic number.

36405779 is a deficient number, since it is larger than the sum of its proper divisors (26221).

36405779 is a wasteful number, since it uses less digits than its factorization.

36405779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26220.

The product of its (nonzero) digits is 158760, while the sum is 41.

The square root of 36405779 is about 6033.7201625531. The cubic root of 36405779 is about 331.4286970319.

The spelling of 36405779 in words is "thirty-six million, four hundred five thousand, seven hundred seventy-nine".