40224399 has 4 divisors (see below), whose sum is σ = 53632536. Its totient is φ = 26816264.

The previous prime is 40224389. The next prime is 40224413. The reversal of 40224399 is 99342204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40224399 - 2⁴ = 40224383 is a prime.

It is a super-2 number, since 2×40224399² = 3236004549822402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40224319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6704064 + ... + 6704069.

It is an arithmetic number, because the mean of its divisors is an integer number (13408134).

Almost surely, 2^40224399 is an apocalyptic number.

40224399 is a deficient number, since it is larger than the sum of its proper divisors (13408137).

40224399 is a wasteful number, since it uses less digits than its factorization.

40224399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13408136.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 40224399 is about 6342.2708078416. The cubic root of 40224399 is about 342.6335252905.

The spelling of 40224399 in words is "forty million, two hundred twenty-four thousand, three hundred ninety-nine".