40640036 has 6 divisors (see below), whose sum is σ = 71120070. Its totient is φ = 20320016.

The previous prime is 40640009. The next prime is 40640051. The reversal of 40640036 is 63004604.

It can be written as a sum of positive squares in only one way, i.e., 39062500 + 1577536 = 6250^2 + 1256^2 .

It is a super-2 number, since 2×40640036² = 3303225052162592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40639993 and 40640020.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5080001 + ... + 5080008.

It is an arithmetic number, because the mean of its divisors is an integer number (11853345).

Almost surely, 2^40640036 is an apocalyptic number.

It is an amenable number.

40640036 is a deficient number, since it is larger than the sum of its proper divisors (30480034).

40640036 is a wasteful number, since it uses less digits than its factorization.

40640036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10160013 (or 10160011 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 40640036 is about 6374.9538037542. The cubic root of 40640036 is about 343.8096228921.

The spelling of 40640036 in words is "forty million, six hundred forty thousand, thirty-six".