40043554 has 8 divisors (see below), whose sum is σ = 60213420. Its totient is φ = 19972416.

The previous prime is 40043533. The next prime is 40043557. The reversal of 40043554 is 45534004.

It can be written as a sum of positive squares in 2 ways, for example, as 38007225 + 2036329 = 6165^2 + 1427^2 .

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

It is not an unprimeable number, because it can be changed into a prime (40043557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23659 + ... + 25294.

Almost surely, 2^40043554 is an apocalyptic number.

40043554 is a deficient number, since it is larger than the sum of its proper divisors (20169866).

40043554 is a wasteful number, since it uses less digits than its factorization.

40043554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49364.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 40043554 is about 6327.9976295824. The cubic root of 40043554 is about 342.1192714646.

Adding to 40043554 its reverse (45534004), we get a palindrome (85577558).

The spelling of 40043554 in words is "forty million, forty-three thousand, five hundred fifty-four".