78304801 has 3 divisors (see below), whose sum is σ = 78313651. Its totient is φ = 78295952.

The previous prime is 78304799. The next prime is 78304813. The reversal of 78304801 is 10840387.

It is a happy number.

The square root of 78304801 is 8849.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 159201 + 78145600 = 399^2 + 8840^2 .

It is not a de Polignac number, because 78304801 - 2¹ = 78304799 is a prime.

It is a super-2 number, since 2×78304801² = 12263283719299202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78304841) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4425 + ... + 13273.

Almost surely, 2^78304801 is an apocalyptic number.

78304801 is the 8849-th square number.

78304801 is the 4425-th centered octagonal number.

It is an amenable number.

78304801 is a deficient number, since it is larger than the sum of its proper divisors (8850).

78304801 is an frugal number, since it uses more digits than its factorization.

78304801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17698 (or 8849 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The cubic root of 78304801 is about 427.8216878122.

The spelling of 78304801 in words is "seventy-eight million, three hundred four thousand, eight hundred one".