40028011 has 4 divisors (see below), whose sum is σ = 40625512. Its totient is φ = 39430512.

The previous prime is 40027997. The next prime is 40028029. The reversal of 40028011 is 11082004.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40028011 is a prime.

It is a super-2 number, since 2×40028011² = 3204483329232242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40028071) 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, 298650 + ... + 298783.

It is an arithmetic number, because the mean of its divisors is an integer number (10156378).

Almost surely, 2^40028011 is an apocalyptic number.

40028011 is a deficient number, since it is larger than the sum of its proper divisors (597501).

40028011 is an equidigital number, since it uses as much as digits as its factorization.

40028011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597500.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 40028011 is about 6326.7693967775. The cubic root of 40028011 is about 342.0750009353.

The spelling of 40028011 in words is "forty million, twenty-eight thousand, eleven".