78740158 has 48 divisors (see below), whose sum is σ = 146906784. Its totient is φ = 31449600.

The previous prime is 78740153. The next prime is 78740159. The reversal of 78740158 is 85104787.

It is a self number, because there is not a number n which added to its sum of digits gives 78740158.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78740153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 251410 + ... + 251722.

It is an arithmetic number, because the mean of its divisors is an integer number (3060558).

Almost surely, 2^78740158 is an apocalyptic number.

78740158 is a deficient number, since it is larger than the sum of its proper divisors (68166626).

78740158 is a wasteful number, since it uses less digits than its factorization.

78740158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497 (or 490 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 78740158 is about 8873.5651234439. The cubic root of 78740158 is about 428.6130869241.

The spelling of 78740158 in words is "seventy-eight million, seven hundred forty thousand, one hundred fifty-eight".