78997948 has 6 divisors (see below), whose sum is σ = 138246416. Its totient is φ = 39498972.

The previous prime is 78997883. The next prime is 78997949. The reversal of 78997948 is 84979987.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78997949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9874740 + ... + 9874747.

Almost surely, 2^78997948 is an apocalyptic number.

It is an amenable number.

78997948 is a deficient number, since it is larger than the sum of its proper divisors (59248468).

78997948 is a wasteful number, since it uses less digits than its factorization.

78997948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19749491 (or 19749489 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 61.

The square root of 78997948 is about 8888.0789825474. The cubic root of 78997948 is about 429.0803275630.

The spelling of 78997948 in words is "seventy-eight million, nine hundred ninety-seven thousand, nine hundred forty-eight".