40342390 has 32 divisors (see below), whose sum is σ = 79825824. Its totient is φ = 14557440.

The previous prime is 40342373. The next prime is 40342409. The reversal of 40342390 is 9324304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13732 + ... + 16408.

It is an arithmetic number, because the mean of its divisors is an integer number (2494557).

Almost surely, 2^40342390 is an apocalyptic number.

40342390 is a deficient number, since it is larger than the sum of its proper divisors (39483434).

40342390 is a wasteful number, since it uses less digits than its factorization.

40342390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2832.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 40342390 is about 6351.5659486461. The cubic root of 40342390 is about 342.9682160792.

Adding to 40342390 its reverse (9324304), we get a palindrome (49666694).

The spelling of 40342390 in words is "forty million, three hundred forty-two thousand, three hundred ninety".