40931090 has 16 divisors (see below), whose sum is σ = 74437272. Its totient is φ = 16203264.

The previous prime is 40931089. The next prime is 40931101. The reversal of 40931090 is 9013904.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22877089 + 18054001 = 4783^2 + 4249^2 .

It is a super-3 number, since 3×40931090³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

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, 20129 + ... + 22068.

Almost surely, 2^40931090 is an apocalyptic number.

40931090 is a deficient number, since it is larger than the sum of its proper divisors (33506182).

40931090 is a wasteful number, since it uses less digits than its factorization.

40931090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42301.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 40931090 is about 6397.7410075745. The cubic root of 40931090 is about 344.6284314385.

Adding to 40931090 its reverse (9013904), we get a palindrome (49944994).

The spelling of 40931090 in words is "forty million, nine hundred thirty-one thousand, ninety".