78188996 has 6 divisors (see below), whose sum is σ = 136830750. Its totient is φ = 39094496.

The previous prime is 78188993. The next prime is 78189011. The reversal of 78188996 is 69988187.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 62188996 + 16000000 = 7886^2 + 4000^2 .

It is a super-2 number, since 2×78188996² = 12227038190976032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78188993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9773621 + ... + 9773628.

It is an arithmetic number, because the mean of its divisors is an integer number (22805125).

Almost surely, 2^78188996 is an apocalyptic number.

It is an amenable number.

78188996 is a deficient number, since it is larger than the sum of its proper divisors (58641754).

78188996 is a wasteful number, since it uses less digits than its factorization.

78188996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19547253 (or 19547251 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 56.

The square root of 78188996 is about 8842.4541842183. The cubic root of 78188996 is about 427.6106818735.

The spelling of 78188996 in words is "seventy-eight million, one hundred eighty-eight thousand, nine hundred ninety-six".