40021324 has 24 divisors (see below), whose sum is σ = 80251808. Its totient is φ = 17107200.

The previous prime is 40021313. The next prime is 40021337. The reversal of 40021324 is 42312004.

It is a junction number, because it is equal to n+sod(n) for n = 40021298 and 40021307.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10474 + ... + 13774.

Almost surely, 2^40021324 is an apocalyptic number.

It is an amenable number.

40021324 is an abundant number, since it is smaller than the sum of its proper divisors (40230484).

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

40021324 is a wasteful number, since it uses less digits than its factorization.

40021324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3745 (or 3743 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 40021324 is about 6326.2409059409. The cubic root of 40021324 is about 342.0559510844.

Adding to 40021324 its reverse (42312004), we get a palindrome (82333328).

The spelling of 40021324 in words is "forty million, twenty-one thousand, three hundred twenty-four".