64503400 has 48 divisors (see below), whose sum is σ = 161513100. Its totient is φ = 23815680.

The previous prime is 64503391. The next prime is 64503403. The reversal of 64503400 is 430546.

It can be written as a sum of positive squares in 6 ways, for example, as 24383844 + 40119556 = 4938^2 + 6334^2 .

It is a super-2 number, since 2×64503400² = 8321377223120000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64503403) 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, 9805 + ... + 15004.

Almost surely, 2^64503400 is an apocalyptic number.

It is an amenable number.

64503400 is an abundant number, since it is smaller than the sum of its proper divisors (97009700).

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

64503400 is a wasteful number, since it uses less digits than its factorization.

64503400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24838 (or 24829 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 64503400 is about 8031.4008740692. The cubic root of 64503400 is about 401.0460122615.

Adding to 64503400 its reverse (430546), we get a palindrome (64933946).

The spelling of 64503400 in words is "sixty-four million, five hundred three thousand, four hundred".