78296949 has 20 divisors (see below), whose sum is σ = 118287180. Its totient is φ = 51606720.

The previous prime is 78296947. The next prime is 78296957. The reversal of 78296949 is 94969287.

It can be written as a sum of positive squares in 2 ways, for example, as 22496049 + 55800900 = 4743^2 + 7470^2 .

It is not a de Polignac number, because 78296949 - 2¹ = 78296947 is a prime.

It is a super-2 number, since 2×78296949² = 12260824445417202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78296895 and 78296904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78296947) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1779 + ... + 12639.

It is an arithmetic number, because the mean of its divisors is an integer number (5914359).

Almost surely, 2^78296949 is an apocalyptic number.

It is an amenable number.

78296949 is a deficient number, since it is larger than the sum of its proper divisors (39990231).

78296949 is a wasteful number, since it uses less digits than its factorization.

78296949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10962 (or 10953 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 78296949 is about 8848.5563229264. The cubic root of 78296949 is about 427.8073874197.

The spelling of 78296949 in words is "seventy-eight million, two hundred ninety-six thousand, nine hundred forty-nine".