40034390 has 16 divisors (see below), whose sum is σ = 78613200. Its totient is φ = 14557920.

The previous prime is 40034389. The next prime is 40034399. The reversal of 40034390 is 9343004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40034399) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 181865 + ... + 182084.

It is an arithmetic number, because the mean of its divisors is an integer number (4913325).

Almost surely, 2^40034390 is an apocalyptic number.

40034390 is a deficient number, since it is larger than the sum of its proper divisors (38578810).

40034390 is a wasteful number, since it uses less digits than its factorization.

40034390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363967.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 40034390 is about 6327.2735044409. The cubic root of 40034390 is about 342.0931713820.

Adding to 40034390 its reverse (9343004), we get a palindrome (49377394).

The spelling of 40034390 in words is "forty million, thirty-four thousand, three hundred ninety".