40556401 has 8 divisors (see below), whose sum is σ = 42024704. Its totient is φ = 39098160.

The previous prime is 40556381. The next prime is 40556419. The reversal of 40556401 is 10465504.

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

It is a cyclic number.

It is not a de Polignac number, because 40556401 - 2¹⁵ = 40523633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40556701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6226 + ... + 10948.

It is an arithmetic number, because the mean of its divisors is an integer number (5253088).

Almost surely, 2^40556401 is an apocalyptic number.

It is an amenable number.

40556401 is a deficient number, since it is larger than the sum of its proper divisors (1468303).

40556401 is a wasteful number, since it uses less digits than its factorization.

40556401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5031.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 40556401 is about 6368.3907700454. The cubic root of 40556401 is about 343.5736137058.

The spelling of 40556401 in words is "forty million, five hundred fifty-six thousand, four hundred one".