40720136 has 8 divisors (see below), whose sum is σ = 76350270. Its totient is φ = 20360064.

The previous prime is 40720129. The next prime is 40720153. The reversal of 40720136 is 63102704.

It can be written as a sum of positive squares in only one way, i.e., 35402500 + 5317636 = 5950^2 + 2306^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2545001 + ... + 2545016.

Almost surely, 2^40720136 is an apocalyptic number.

It is an amenable number.

40720136 is a deficient number, since it is larger than the sum of its proper divisors (35630134).

40720136 is a wasteful number, since it uses less digits than its factorization.

40720136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5090023 (or 5090019 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 40720136 is about 6381.2331096740. The cubic root of 40720136 is about 344.0353533163.

The spelling of 40720136 in words is "forty million, seven hundred twenty thousand, one hundred thirty-six".