40047089 has 4 divisors (see below), whose sum is σ = 40302324. Its totient is φ = 39791856.

The previous prime is 40047083. The next prime is 40047097. The reversal of 40047089 is 98074004.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19070689 + 20976400 = 4367^2 + 4580^2 .

It is a cyclic number.

It is not a de Polignac number, because 40047089 - 2¹² = 40042993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40047083) 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, 127382 + ... + 127695.

It is an arithmetic number, because the mean of its divisors is an integer number (10075581).

Almost surely, 2^40047089 is an apocalyptic number.

It is an amenable number.

40047089 is a deficient number, since it is larger than the sum of its proper divisors (255235).

40047089 is a wasteful number, since it uses less digits than its factorization.

40047089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255234.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 40047089 is about 6328.2769376822. The cubic root of 40047089 is about 342.1293384701.

It can be divided in two parts, 400 and 47089, that multiplied together give a square (18835600 = 4340²).

The spelling of 40047089 in words is "forty million, forty-seven thousand, eighty-nine".