40388234 has 16 divisors (see below), whose sum is σ = 61531272. Its totient is φ = 19880448.

The previous prime is 40388233. The next prime is 40388261. The reversal of 40388234 is 43288304.

It can be written as a sum of positive squares in 4 ways, for example, as 39100009 + 1288225 = 6253^2 + 1135^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 40388234.

It is not an unprimeable number, because it can be changed into a prime (40388233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38582 + ... + 39614.

Almost surely, 2^40388234 is an apocalyptic number.

40388234 is a deficient number, since it is larger than the sum of its proper divisors (21143038).

40388234 is a wasteful number, since it uses less digits than its factorization.

40388234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321.

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 40388234 is about 6355.1737977808. The cubic root of 40388234 is about 343.0980801660.

The spelling of 40388234 in words is "forty million, three hundred eighty-eight thousand, two hundred thirty-four".