40640877 has 12 divisors (see below), whose sum is σ = 59811804. Its totient is φ = 26582400.

The previous prime is 40640869. The next prime is 40640879. The reversal of 40640877 is 77804604.

It is a happy number.

40640877 is a `hidden beast` number, since 4 + 0 + 640 + 8 + 7 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27311076 + 13329801 = 5226^2 + 3651^2 .

It is not a de Polignac number, because 40640877 - 2³ = 40640869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40640879) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42124 + ... + 43077.

It is an arithmetic number, because the mean of its divisors is an integer number (4984317).

Almost surely, 2^40640877 is an apocalyptic number.

It is an amenable number.

40640877 is a deficient number, since it is larger than the sum of its proper divisors (19170927).

40640877 is a wasteful number, since it uses less digits than its factorization.

40640877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85260 (or 85257 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 40640877 is about 6375.0197646752. The cubic root of 40640877 is about 343.8119944607.

The spelling of 40640877 in words is "forty million, six hundred forty thousand, eight hundred seventy-seven".