40400024 has 32 divisors (see below), whose sum is σ = 91666080. Its totient is φ = 16295424.

The previous prime is 40400021. The next prime is 40400027. The reversal of 40400024 is 42000404.

It is an interprime number because it is at equal distance from previous prime (40400021) and next prime (40400027).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 40399981 and 40400008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40400021) 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, 20267 + ... + 22170.

It is an arithmetic number, because the mean of its divisors is an integer number (2864565).

Almost surely, 2^40400024 is an apocalyptic number.

It is an amenable number.

40400024 is an abundant number, since it is smaller than the sum of its proper divisors (51266056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40400024 is a wasteful number, since it uses less digits than its factorization.

40400024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42467 (or 42463 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 40400024 is about 6356.1013207783. The cubic root of 40400024 is about 343.1314622711.

Adding to 40400024 its reverse (42000404), we get a palindrome (82400428).

The spelling of 40400024 in words is "forty million, four hundred thousand, twenty-four".