73278441 has 6 divisors (see below), whose sum is σ = 105846650. Its totient is φ = 48852288.

The previous prime is 73278409. The next prime is 73278467. The reversal of 73278441 is 14487237.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 61168041 + 12110400 = 7821^2 + 3480^2 .

It is not a de Polignac number, because 73278441 - 2⁵ = 73278409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73278396 and 73278405.

It is not an unprimeable number, because it can be changed into a prime (73278481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4071016 + ... + 4071033.

Almost surely, 2^73278441 is an apocalyptic number.

It is an amenable number.

73278441 is a deficient number, since it is larger than the sum of its proper divisors (32568209).

73278441 is a wasteful number, since it uses less digits than its factorization.

73278441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8142055 (or 8142052 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 73278441 is about 8560.2827640213. The cubic root of 73278441 is about 418.4646150544.

The spelling of 73278441 in words is "seventy-three million, two hundred seventy-eight thousand, four hundred forty-one".