40038556 has 18 divisors (see below), whose sum is σ = 70695240. Its totient is φ = 19841400.

The previous prime is 40038539. The next prime is 40038563. The reversal of 40038556 is 65583004.

It is a congruent number.

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, 90985 + ... + 91423.

Almost surely, 2^40038556 is an apocalyptic number.

It is an amenable number.

40038556 is a deficient number, since it is larger than the sum of its proper divisors (30656684).

40038556 is a wasteful number, since it uses less digits than its factorization.

40038556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745 (or 592 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 40038556 is about 6327.6027056066. The cubic root of 40038556 is about 342.1050371031.

It can be divided in two parts, 40038 and 556, that multiplied together give a triangular number (22261128 = T₆₆₇₂).

The spelling of 40038556 in words is "forty million, thirty-eight thousand, five hundred fifty-six".