36781530 has 64 divisors (see below), whose sum is σ = 93709440. Its totient is φ = 9213696.

The previous prime is 36781519. The next prime is 36781543. The reversal of 36781530 is 3518763.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 36781491 and 36781500.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98424 + ... + 98796.

It is an arithmetic number, because the mean of its divisors is an integer number (1464210).

Almost surely, 2^36781530 is an apocalyptic number.

36781530 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 36781530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46854720).

36781530 is an abundant number, since it is smaller than the sum of its proper divisors (56927910).

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

36781530 is a wasteful number, since it uses less digits than its factorization.

36781530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 36781530 is about 6064.7778195083. Note that the first 3 decimals coincide. The cubic root of 36781530 is about 332.5650427716.

The spelling of 36781530 in words is "thirty-six million, seven hundred eighty-one thousand, five hundred thirty".