78245331 has 16 divisors (see below), whose sum is σ = 107032320. Its totient is φ = 50824800.

The previous prime is 78245327. The next prime is 78245353. The reversal of 78245331 is 13354287.

It is not a de Polignac number, because 78245331 - 2² = 78245327 is a prime.

It is a super-2 number, since 2×78245331² = 12244663646599122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78245292 and 78245301.

It is not an unprimeable number, because it can be changed into a prime (78245231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22380 + ... + 25638.

It is an arithmetic number, because the mean of its divisors is an integer number (6689520).

Almost surely, 2^78245331 is an apocalyptic number.

78245331 is a deficient number, since it is larger than the sum of its proper divisors (28786989).

78245331 is a wasteful number, since it uses less digits than its factorization.

78245331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3466.

The product of its digits is 20160, while the sum is 33.

The square root of 78245331 is about 8845.6390950570. The cubic root of 78245331 is about 427.7133547381.

The spelling of 78245331 in words is "seventy-eight million, two hundred forty-five thousand, three hundred thirty-one".