40434157 has 2 divisors, whose sum is σ = 40434158. Its totient is φ = 40434156.

The previous prime is 40434151. The next prime is 40434169. The reversal of 40434157 is 75143404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39576681 + 857476 = 6291^2 + 926^2 .

It is a cyclic number.

It is not a de Polignac number, because 40434157 - 2⁷ = 40434029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40434151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20217078 + 20217079.

It is an arithmetic number, because the mean of its divisors is an integer number (20217079).

Almost surely, 2^40434157 is an apocalyptic number.

It is an amenable number.

40434157 is a deficient number, since it is larger than the sum of its proper divisors (1).

40434157 is an equidigital number, since it uses as much as digits as its factorization.

40434157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 40434157 is about 6358.7858117726. The cubic root of 40434157 is about 343.2280695514.

The spelling of 40434157 in words is "forty million, four hundred thirty-four thousand, one hundred fifty-seven".