400023324 has 36 divisors (see below), whose sum is σ = 1034689656. Its totient is φ = 130239648.

The previous prime is 400023313. The next prime is 400023331. The reversal of 400023324 is 423320004.

It is a tau number, because it is divible by the number of its divisors (36).

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 = 400023297 and 400023306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127659 + ... + 130754.

Almost surely, 2^400023324 is an apocalyptic number.

It is an amenable number.

400023324 is an abundant number, since it is smaller than the sum of its proper divisors (634666332).

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

400023324 is a wasteful number, since it uses less digits than its factorization.

400023324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258466 (or 258461 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 400023324 is about 20000.5830915001. The cubic root of 400023324 is about 736.8206205082.

Adding to 400023324 its reverse (423320004), we get a palindrome (823343328).

The spelling of 400023324 in words is "four hundred million, twenty-three thousand, three hundred twenty-four".