78961730 has 16 divisors (see below), whose sum is σ = 143156160. Its totient is φ = 31356912.

The previous prime is 78961721. The next prime is 78961741. The reversal of 78961730 is 3716987.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27014 + ... + 29793.

It is an arithmetic number, because the mean of its divisors is an integer number (8947260).

Almost surely, 2^78961730 is an apocalyptic number.

78961730 is a deficient number, since it is larger than the sum of its proper divisors (64194430).

78961730 is a wasteful number, since it uses less digits than its factorization.

78961730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56953.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 78961730 is about 8886.0413008268. The cubic root of 78961730 is about 429.0147443961.

The spelling of 78961730 in words is "seventy-eight million, nine hundred sixty-one thousand, seven hundred thirty".