63403400 has 48 divisors (see below), whose sum is σ = 149858340. Its totient is φ = 24940800.

The previous prime is 63403397. The next prime is 63403409. The reversal of 63403400 is 430436.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 6280036 + 57123364 = 2506^2 + 7558^2 .

It is a super-2 number, since 2×63403400² = 8039982263120000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (63403409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9602 + ... + 14798.

Almost surely, 2^63403400 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 63403400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74929170).

63403400 is an abundant number, since it is smaller than the sum of its proper divisors (86454940).

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

63403400 is a wasteful number, since it uses less digits than its factorization.

63403400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5274 (or 5265 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 63403400 is about 7962.6251952481. The cubic root of 63403400 is about 398.7532011024.

Adding to 63403400 its reverse (430436), we get a palindrome (63833836).

The spelling of 63403400 in words is "sixty-three million, four hundred three thousand, four hundred".