40978269 has 24 divisors (see below), whose sum is σ = 63766560. Its totient is φ = 25274592.

The previous prime is 40978261. The next prime is 40978283. The reversal of 40978269 is 96287904.

It is a happy number.

It is not a de Polignac number, because 40978269 - 2³ = 40978261 is a prime.

It is a super-2 number, since 2×40978269² = 3358437060472722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40978261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4567 + ... + 10139.

It is an arithmetic number, because the mean of its divisors is an integer number (2656940).

Almost surely, 2^40978269 is an apocalyptic number.

It is an amenable number.

40978269 is a deficient number, since it is larger than the sum of its proper divisors (22788291).

40978269 is a wasteful number, since it uses less digits than its factorization.

40978269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5641 (or 5638 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 40978269 is about 6401.4271065130. The cubic root of 40978269 is about 344.7607919638.

The spelling of 40978269 in words is "forty million, nine hundred seventy-eight thousand, two hundred sixty-nine".