40087771 has 4 divisors (see below), whose sum is σ = 40111992. Its totient is φ = 40063552.

The previous prime is 40087759. The next prime is 40087783. The reversal of 40087771 is 17778004.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (40087759) and next prime (40087783).

It is a cyclic number.

It is not a de Polignac number, because 40087771 - 2²⁵ = 6533339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40087721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9430 + ... + 13003.

It is an arithmetic number, because the mean of its divisors is an integer number (10027998).

Almost surely, 2^40087771 is an apocalyptic number.

40087771 is a deficient number, since it is larger than the sum of its proper divisors (24221).

40087771 is a wasteful number, since it uses less digits than its factorization.

40087771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24220.

The product of its (nonzero) digits is 10976, while the sum is 34.

The square root of 40087771 is about 6331.4904248526. The cubic root of 40087771 is about 342.2451504280.

The spelling of 40087771 in words is "forty million, eighty-seven thousand, seven hundred seventy-one".