40043870 has 8 divisors (see below), whose sum is σ = 72078984. Its totient is φ = 16017544.

The previous prime is 40043869. The next prime is 40043881. The reversal of 40043870 is 7834004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2002184 + ... + 2002203.

It is an arithmetic number, because the mean of its divisors is an integer number (9009873).

Almost surely, 2^40043870 is an apocalyptic number.

40043870 is a deficient number, since it is larger than the sum of its proper divisors (32035114).

40043870 is a wasteful number, since it uses less digits than its factorization.

40043870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004394.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 40043870 is about 6328.0225979369. The cubic root of 40043870 is about 342.1201713964.

Adding to 40043870 its reverse (7834004), we get a palindrome (47877874).

The spelling of 40043870 in words is "forty million, forty-three thousand, eight hundred seventy".