36640738 has 4 divisors (see below), whose sum is σ = 54961110. Its totient is φ = 18320368.

The previous prime is 36640733. The next prime is 36640781. The reversal of 36640738 is 83704663.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83704663 = 7 ⋅11957809.

It can be written as a sum of positive squares in only one way, i.e., 36566209 + 74529 = 6047^2 + 273^2 .

It is a junction number, because it is equal to n+sod(n) for n = 36640697 and 36640706.

It is not an unprimeable number, because it can be changed into a prime (36640733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9160183 + ... + 9160186.

Almost surely, 2^36640738 is an apocalyptic number.

36640738 is a deficient number, since it is larger than the sum of its proper divisors (18320372).

36640738 is a wasteful number, since it uses less digits than its factorization.

36640738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18320371.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 36640738 is about 6053.1593403776. The cubic root of 36640738 is about 332.1401704048.

The spelling of 36640738 in words is "thirty-six million, six hundred forty thousand, seven hundred thirty-eight".