36405780 has 144 divisors (see below), whose sum is σ = 112971264. Its totient is φ = 8743680.

The previous prime is 36405739. The next prime is 36405791. The reversal of 36405780 is 8750463.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 983922 + ... + 983958.

Almost surely, 2^36405780 is an apocalyptic number.

36405780 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 36405780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56485632).

36405780 is an abundant number, since it is smaller than the sum of its proper divisors (76565484).

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

36405780 is a wasteful number, since it uses less digits than its factorization.

36405780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 36405780 is about 6033.7202454207. The cubic root of 36405780 is about 331.4287000665.

The spelling of 36405780 in words is "thirty-six million, four hundred five thousand, seven hundred eighty".