78180988 has 6 divisors (see below), whose sum is σ = 136816736. Its totient is φ = 39090492.

The previous prime is 78180929. The next prime is 78180997. The reversal of 78180988 is 88908187.

It is a super-2 number, since 2×78180988² = 12224533769312288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9772620 + ... + 9772627.

Almost surely, 2^78180988 is an apocalyptic number.

It is an amenable number.

78180988 is a deficient number, since it is larger than the sum of its proper divisors (58635748).

78180988 is a wasteful number, since it uses less digits than its factorization.

78180988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19545251 (or 19545249 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 49.

The square root of 78180988 is about 8842.0013571589. The cubic root of 78180988 is about 427.5960829596.

The spelling of 78180988 in words is "seventy-eight million, one hundred eighty thousand, nine hundred eighty-eight".