40284289 has 4 divisors (see below), whose sum is σ = 40390960. Its totient is φ = 40177620.

The previous prime is 40284287. The next prime is 40284319. The reversal of 40284289 is 98248204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40284289 - 2¹ = 40284287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40284287) 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, 52767 + ... + 53524.

It is an arithmetic number, because the mean of its divisors is an integer number (10097740).

Almost surely, 2^40284289 is an apocalyptic number.

It is an amenable number.

40284289 is a deficient number, since it is larger than the sum of its proper divisors (106671).

40284289 is a wasteful number, since it uses less digits than its factorization.

40284289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106670.

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 40284289 is about 6346.9905467079. The cubic root of 40284289 is about 342.8034896781.

The spelling of 40284289 in words is "forty million, two hundred eighty-four thousand, two hundred eighty-nine".