78742154 has 8 divisors (see below), whose sum is σ = 118162368. Its totient is φ = 39354700.

The previous prime is 78742151. The next prime is 78742189. The reversal of 78742154 is 45124787.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (78742151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 872 + ... + 12579.

It is an arithmetic number, because the mean of its divisors is an integer number (14770296).

Almost surely, 2^78742154 is an apocalyptic number.

78742154 is a deficient number, since it is larger than the sum of its proper divisors (39420214).

78742154 is a wasteful number, since it uses less digits than its factorization.

78742154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16380.

The product of its digits is 62720, while the sum is 38.

The square root of 78742154 is about 8873.6775916189. The cubic root of 78742154 is about 428.6167085598.

The spelling of 78742154 in words is "seventy-eight million, seven hundred forty-two thousand, one hundred fifty-four".