40403124 has 72 divisors (see below), whose sum is σ = 106954848. Its totient is φ = 13335840.

The previous prime is 40403123. The next prime is 40403147. The reversal of 40403124 is 42130404.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 40403097 and 40403106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40403123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 191379 + ... + 191589.

It is an arithmetic number, because the mean of its divisors is an integer number (1485484).

Almost surely, 2^40403124 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40403124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53477424).

40403124 is an abundant number, since it is smaller than the sum of its proper divisors (66551724).

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

40403124 is a wasteful number, since it uses less digits than its factorization.

40403124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 40403124 is about 6356.3451762786. The cubic root of 40403124 is about 343.1402385062.

Adding to 40403124 its reverse (42130404), we get a palindrome (82533528).

The spelling of 40403124 in words is "forty million, four hundred three thousand, one hundred twenty-four".