40389236 has 6 divisors (see below), whose sum is σ = 70681170. Its totient is φ = 20194616.

The previous prime is 40389197. The next prime is 40389289. The reversal of 40389236 is 63298304.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20976400 + 19412836 = 4580^2 + 4406^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40389196 and 40389205.

It is a congruent number.

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, 5048651 + ... + 5048658.

It is an arithmetic number, because the mean of its divisors is an integer number (11780195).

Almost surely, 2^40389236 is an apocalyptic number.

It is an amenable number.

40389236 is a deficient number, since it is larger than the sum of its proper divisors (30291934).

40389236 is a wasteful number, since it uses less digits than its factorization.

40389236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10097313 (or 10097311 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 40389236 is about 6355.2526306985. The cubic root of 40389236 is about 343.1009174729.

The spelling of 40389236 in words is "forty million, three hundred eighty-nine thousand, two hundred thirty-six".