40261969 has 12 divisors (see below), whose sum is σ = 46360080. Its totient is φ = 34671960.

The previous prime is 40261943. The next prime is 40261999. The reversal of 40261969 is 96916204.

It is not a de Polignac number, because 40261969 - 2¹⁹ = 39737681 is a prime.

It is a super-2 number, since 2×40261969² = 3242052295513922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40261919) 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, 1099 + ... + 9040.

It is an arithmetic number, because the mean of its divisors is an integer number (3863340).

Almost surely, 2^40261969 is an apocalyptic number.

It is an amenable number.

40261969 is a deficient number, since it is larger than the sum of its proper divisors (6098111).

40261969 is a wasteful number, since it uses less digits than its factorization.

40261969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10188 (or 10169 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 40261969 is about 6345.2319894548. The cubic root of 40261969 is about 342.7401665015.

It can be divided in two parts, 4026 and 1969, that added together give a palindrome (5995).

The spelling of 40261969 in words is "forty million, two hundred sixty-one thousand, nine hundred sixty-nine".