40990390 has 16 divisors (see below), whose sum is σ = 84323232. Its totient is φ = 14053824.

The previous prime is 40990387. The next prime is 40990409. The reversal of 40990390 is 9309904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292719 + ... + 292858.

It is an arithmetic number, because the mean of its divisors is an integer number (5270202).

Almost surely, 2^40990390 is an apocalyptic number.

40990390 is an abundant number, since it is smaller than the sum of its proper divisors (43332842).

40990390 is a wasteful number, since it uses less digits than its factorization.

40990390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585591.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 40990390 is about 6402.3737785293. The cubic root of 40990390 is about 344.7947809838.

The spelling of 40990390 in words is "forty million, nine hundred ninety thousand, three hundred ninety".