73443400 has 48 divisors (see below), whose sum is σ = 180808740. Its totient is φ = 27648000.

The previous prime is 73443397. The next prime is 73443401. The reversal of 73443400 is 434437.

It can be written as a sum of positive squares in 6 ways, for example, as 53319204 + 20124196 = 7302^2 + 4486^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (73443401) 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, 7401 + ... + 14200.

Almost surely, 2^73443400 is an apocalyptic number.

It is an amenable number.

73443400 is an abundant number, since it is smaller than the sum of its proper divisors (107365340).

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

73443400 is a wasteful number, since it uses less digits than its factorization.

73443400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21634 (or 21625 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 25.

The square root of 73443400 is about 8569.9124849674. The cubic root of 73443400 is about 418.7783852445.

Adding to 73443400 its reverse (434437), we get a palindrome (73877837).

The spelling of 73443400 in words is "seventy-three million, four hundred forty-three thousand, four hundred".