40220469 has 10 divisors (see below), whose sum is σ = 60082550. Its totient is φ = 26813592.

The previous prime is 40220461. The next prime is 40220483. The reversal of 40220469 is 96402204.

It can be written as a sum of positive squares in only one way, i.e., 38564100 + 1656369 = 6210^2 + 1287^2 .

It is not a de Polignac number, because 40220469 - 2³ = 40220461 is a prime.

It is a super-2 number, since 2×40220469² = 3235372253159922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40220461) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 248194 + ... + 248355.

It is an arithmetic number, because the mean of its divisors is an integer number (6008255).

Almost surely, 2^40220469 is an apocalyptic number.

It is an amenable number.

40220469 is a deficient number, since it is larger than the sum of its proper divisors (19862081).

40220469 is an equidigital number, since it uses as much as digits as its factorization.

40220469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496561 (or 496552 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 40220469 is about 6341.9609743359. The cubic root of 40220469 is about 342.6223662788.

The spelling of 40220469 in words is "forty million, two hundred twenty thousand, four hundred sixty-nine".