40128877 has 2 divisors, whose sum is σ = 40128878. Its totient is φ = 40128876.

The previous prime is 40128871. The next prime is 40128901. The reversal of 40128877 is 77882104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27941796 + 12187081 = 5286^2 + 3491^2 .

It is a cyclic number.

It is not a de Polignac number, because 40128877 - 2¹¹ = 40126829 is a prime.

It is a super-2 number, since 2×40128877² = 3220653538562258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40128871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20064438 + 20064439.

It is an arithmetic number, because the mean of its divisors is an integer number (20064439).

Almost surely, 2^40128877 is an apocalyptic number.

It is an amenable number.

40128877 is a deficient number, since it is larger than the sum of its proper divisors (1).

40128877 is an equidigital number, since it uses as much as digits as its factorization.

40128877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 40128877 is about 6334.7357482376. The cubic root of 40128877 is about 342.3620898585.

The spelling of 40128877 in words is "forty million, one hundred twenty-eight thousand, eight hundred seventy-seven".