40889569 has 12 divisors (see below), whose sum is σ = 47706948. Its totient is φ = 34944000.

The previous prime is 40889567. The next prime is 40889579. The reversal of 40889569 is 96598804.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 31360000 + 9529569 = 5600^2 + 3087^2 .

It is not a de Polignac number, because 40889569 - 2¹ = 40889567 is a prime.

It is a super-2 number, since 2×40889569² = 3343913706011522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40889567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18609 + ... + 20689.

It is an arithmetic number, because the mean of its divisors is an integer number (3975579).

Almost surely, 2^40889569 is an apocalyptic number.

40889569 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

40889569 is a deficient number, since it is larger than the sum of its proper divisors (6817379).

40889569 is a wasteful number, since it uses less digits than its factorization.

40889569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2496 (or 2489 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 40889569 is about 6394.4952107262. The cubic root of 40889569 is about 344.5118602425.

The spelling of 40889569 in words is "forty million, eight hundred eighty-nine thousand, five hundred sixty-nine".