403240400 has 30 divisors (see below), whose sum is σ = 968786022. Its totient is φ = 161296000.

The previous prime is 403240373. The next prime is 403240429. The reversal of 403240400 is 4042304.

It can be written as a sum of positive squares in 3 ways, for example, as 355216 + 402885184 = 596^2 + 20072^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 503651 + ... + 504450.

Almost surely, 2^403240400 is an apocalyptic number.

403240400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

403240400 is an abundant number, since it is smaller than the sum of its proper divisors (565545622).

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

403240400 is a wasteful number, since it uses less digits than its factorization.

403240400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008119 (or 1008108 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 403240400 is about 20080.8465956991. The cubic root of 403240400 is about 738.7905737453.

Adding to 403240400 its reverse (4042304), we get a palindrome (407282704).

The spelling of 403240400 in words is "four hundred three million, two hundred forty thousand, four hundred".