40173858 has 12 divisors (see below), whose sum is σ = 87043398. Its totient is φ = 13391280.

The previous prime is 40173829. The next prime is 40173869. The reversal of 40173858 is 85837104.

It can be written as a sum of positive squares in only one way, i.e., 37051569 + 3122289 = 6087^2 + 1767^2 .

It is a super-2 number, since 2×40173858² = 3227877733208328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1115923 + ... + 1115958.

Almost surely, 2^40173858 is an apocalyptic number.

40173858 is an abundant number, since it is smaller than the sum of its proper divisors (46869540).

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

40173858 is a wasteful number, since it uses less digits than its factorization.

40173858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231889 (or 2231886 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 40173858 is about 6338.2850992993. The cubic root of 40173858 is about 342.4899615223.

It can be divided in two parts, 4017 and 3858, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 40173858 in words is "forty million, one hundred seventy-three thousand, eight hundred fifty-eight".