78353936 has 20 divisors (see below), whose sum is σ = 152213100. Its totient is φ = 39073152.

The previous prime is 78353923. The next prime is 78353963. The reversal of 78353936 is 63935387.

It can be written as a sum of positive squares in 2 ways, for example, as 11833600 + 66520336 = 3440^2 + 8156^2 .

It is a super-2 number, since 2×78353936² = 12278678573384192, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71 + ... + 12518.

It is an arithmetic number, because the mean of its divisors is an integer number (7610655).

Almost surely, 2^78353936 is an apocalyptic number.

It is an amenable number.

78353936 is a deficient number, since it is larger than the sum of its proper divisors (73859164).

78353936 is a wasteful number, since it uses less digits than its factorization.

78353936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12986 (or 12980 counting only the distinct ones).

The product of its digits is 408240, while the sum is 44.

The square root of 78353936 is about 8851.7758670224. The cubic root of 78353936 is about 427.9111528391.

The spelling of 78353936 in words is "seventy-eight million, three hundred fifty-three thousand, nine hundred thirty-six".