40023790 has 64 divisors (see below), whose sum is σ = 78962688. Its totient is φ = 14572800.

The previous prime is 40023787. The next prime is 40023791. The reversal of 40023790 is 9732004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40023791) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 597337 + ... + 597403.

It is an arithmetic number, because the mean of its divisors is an integer number (1233792).

Almost surely, 2^40023790 is an apocalyptic number.

40023790 is a deficient number, since it is larger than the sum of its proper divisors (38938898).

40023790 is a wasteful number, since it uses less digits than its factorization.

40023790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 40023790 is about 6326.4358054121. The cubic root of 40023790 is about 342.0629764446.

Adding to 40023790 its reverse (9732004), we get a palindrome (49755794).

The spelling of 40023790 in words is "forty million, twenty-three thousand, seven hundred ninety".