40430557 has 2 divisors, whose sum is σ = 40430558. Its totient is φ = 40430556.

The previous prime is 40430543. The next prime is 40430563. The reversal of 40430557 is 75503404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27657081 + 12773476 = 5259^2 + 3574^2 .

It is a cyclic number.

It is not a de Polignac number, because 40430557 - 2¹⁵ = 40397789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40430597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20215278 + 20215279.

It is an arithmetic number, because the mean of its divisors is an integer number (20215279).

Almost surely, 2^40430557 is an apocalyptic number.

It is an amenable number.

40430557 is a deficient number, since it is larger than the sum of its proper divisors (1).

40430557 is an equidigital number, since it uses as much as digits as its factorization.

40430557 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 40430557 is about 6358.5027325621. The cubic root of 40430557 is about 343.2178829681.

The spelling of 40430557 in words is "forty million, four hundred thirty thousand, five hundred fifty-seven".