40997556 has 24 divisors (see below), whose sum is σ = 106290240. Its totient is φ = 13665816.

The previous prime is 40997543. The next prime is 40997563. The reversal of 40997556 is 65579904.

It is a happy number.

40997556 is a `hidden beast` number, since 4 + 0 + 9 + 97 + 556 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189696 + ... + 189911.

It is an arithmetic number, because the mean of its divisors is an integer number (4428760).

Almost surely, 2^40997556 is an apocalyptic number.

It is an amenable number.

40997556 is an abundant number, since it is smaller than the sum of its proper divisors (65292684).

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

40997556 is a wasteful number, since it uses less digits than its factorization.

40997556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379620 (or 379612 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The square root of 40997556 is about 6402.9333902517. The cubic root of 40997556 is about 344.8148723225.

The spelling of 40997556 in words is "forty million, nine hundred ninety-seven thousand, five hundred fifty-six".