40390269 has 8 divisors (see below), whose sum is σ = 53939520. Its totient is φ = 26883936.

The previous prime is 40390261. The next prime is 40390271. The reversal of 40390269 is 96209304.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40390269 - 2³ = 40390261 is a prime.

It is a super-2 number, since 2×40390269² = 3262747659784722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40390261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8464 + ... + 12345.

It is an arithmetic number, because the mean of its divisors is an integer number (6742440).

Almost surely, 2^40390269 is an apocalyptic number.

It is an amenable number.

40390269 is a deficient number, since it is larger than the sum of its proper divisors (13549251).

40390269 is a wasteful number, since it uses less digits than its factorization.

40390269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21459.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 40390269 is about 6355.3339015350. Note that the first 3 decimals coincide. The cubic root of 40390269 is about 343.1038425115.

The spelling of 40390269 in words is "forty million, three hundred ninety thousand, two hundred sixty-nine".