40202090 has 16 divisors (see below), whose sum is σ = 73730088. Its totient is φ = 15777216.

The previous prime is 40202087. The next prime is 40202153. The reversal of 40202090 is 9020204.

It can be written as a sum of positive squares in 4 ways, for example, as 27762361 + 12439729 = 5269^2 + 3527^2 .

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, 37397 + ... + 38456.

Almost surely, 2^40202090 is an apocalyptic number.

40202090 is a deficient number, since it is larger than the sum of its proper divisors (33527998).

40202090 is a wasteful number, since it uses less digits than its factorization.

40202090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75913.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 40202090 is about 6340.5118089946. The cubic root of 40202090 is about 342.5701705020.

Adding to 40202090 its reverse (9020204), we get a palindrome (49222294).

The spelling of 40202090 in words is "forty million, two hundred two thousand, ninety".