78793870 has 16 divisors (see below), whose sum is σ = 146720160. Its totient is φ = 30430624.

The previous prime is 78793829. The next prime is 78793873. The reversal of 78793870 is 7839787.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78793873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135562 + ... + 136141.

It is an arithmetic number, because the mean of its divisors is an integer number (9170010).

Almost surely, 2^78793870 is an apocalyptic number.

78793870 is a deficient number, since it is larger than the sum of its proper divisors (67926290).

78793870 is a wasteful number, since it uses less digits than its factorization.

78793870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271739.

The product of its (nonzero) digits is 592704, while the sum is 49.

The square root of 78793870 is about 8876.5911249758. The cubic root of 78793870 is about 428.7105231583.

The spelling of 78793870 in words is "seventy-eight million, seven hundred ninety-three thousand, eight hundred seventy".