40557403 has 2 divisors, whose sum is σ = 40557404. Its totient is φ = 40557402.

The previous prime is 40557373. The next prime is 40557443. The reversal of 40557403 is 30475504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40557403 - 2⁵ = 40557371 is a prime.

It is not a weakly prime, because it can be changed into another prime (40557443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20278701 + 20278702.

It is an arithmetic number, because the mean of its divisors is an integer number (20278702).

Almost surely, 2^40557403 is an apocalyptic number.

40557403 is a deficient number, since it is larger than the sum of its proper divisors (1).

40557403 is an equidigital number, since it uses as much as digits as its factorization.

40557403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 40557403 is about 6368.4694393551. The cubic root of 40557403 is about 343.5764431640.

The spelling of 40557403 in words is "forty million, five hundred fifty-seven thousand, four hundred three".