78267996 has 36 divisors (see below), whose sum is σ = 198270072. Its totient is φ = 26033184.

The previous prime is 78267991. The next prime is 78267997. The reversal of 78267996 is 69976287.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×78267996² = 12251758395712032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78267991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16750 + ... + 20906.

It is an arithmetic number, because the mean of its divisors is an integer number (5507502).

Almost surely, 2^78267996 is an apocalyptic number.

It is an amenable number.

78267996 is an abundant number, since it is smaller than the sum of its proper divisors (120002076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78267996 is a wasteful number, since it uses less digits than its factorization.

78267996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4690 (or 4685 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 78267996 is about 8846.9201420607. The cubic root of 78267996 is about 427.7546487348.

The spelling of 78267996 in words is "seventy-eight million, two hundred sixty-seven thousand, nine hundred ninety-six".