40861890 has 24 divisors (see below), whose sum is σ = 106241148. Its totient is φ = 10896480.

The previous prime is 40861889. The next prime is 40861921. The reversal of 40861890 is 9816804.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 40793769 + 68121 = 6387^2 + 261^2 .

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 11 ways as a sum of consecutive naturals, for example, 226921 + ... + 227100.

Almost surely, 2^40861890 is an apocalyptic number.

40861890 is an abundant number, since it is smaller than the sum of its proper divisors (65379258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40861890 is a wasteful number, since it uses less digits than its factorization.

40861890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454034 (or 454031 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 40861890 is about 6392.3305609144. The cubic root of 40861890 is about 344.4341069469.

The spelling of 40861890 in words is "forty million, eight hundred sixty-one thousand, eight hundred ninety".