40871820 has 48 divisors (see below), whose sum is σ = 124846848. Its totient is φ = 9908160.

The previous prime is 40871797. The next prime is 40871821. The reversal of 40871820 is 2817804.

It is a super-2 number, since 2×40871820² = 3341011340224800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (40871821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30304 + ... + 31623.

It is an arithmetic number, because the mean of its divisors is an integer number (2600976).

Almost surely, 2^40871820 is an apocalyptic number.

It is an amenable number.

40871820 is an abundant number, since it is smaller than the sum of its proper divisors (83975028).

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

40871820 is a wasteful number, since it uses less digits than its factorization.

40871820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61950 (or 61948 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 40871820 is about 6393.1072257549. The cubic root of 40871820 is about 344.4620054252.

It can be divided in two parts, 40 and 871820, that added together give a triangular number (871860 = T₁₃₂₀).

The spelling of 40871820 in words is "forty million, eight hundred seventy-one thousand, eight hundred twenty".