40409253 has 8 divisors (see below), whose sum is σ = 59865600. Its totient is φ = 26939484.

The previous prime is 40409249. The next prime is 40409263. The reversal of 40409253 is 35290404.

40409253 is a `hidden beast` number, since 4 + 0 + 409 + 253 = 666.

It is not a de Polignac number, because 40409253 - 2² = 40409249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1496639 = 40409253 / (4 + 0 + 4 + 0 + 9 + 2 + 5 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40409203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 748293 + ... + 748346.

It is an arithmetic number, because the mean of its divisors is an integer number (7483200).

Almost surely, 2^40409253 is an apocalyptic number.

It is an amenable number.

40409253 is a deficient number, since it is larger than the sum of its proper divisors (19456347).

40409253 is a wasteful number, since it uses less digits than its factorization.

40409253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496648 (or 1496642 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 40409253 is about 6356.8272746709. The cubic root of 40409253 is about 343.1575886513.

Adding to 40409253 its reverse (35290404), we get a palindrome (75699657).

The spelling of 40409253 in words is "forty million, four hundred nine thousand, two hundred fifty-three".