78118357 has 4 divisors (see below), whose sum is σ = 80638336. Its totient is φ = 75598380.

The previous prime is 78118309. The next prime is 78118361. The reversal of 78118357 is 75381187.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78118357 is a prime.

It is a super-2 number, since 2×78118357² = 12204955400758898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78118657) 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, 1259943 + ... + 1260004.

It is an arithmetic number, because the mean of its divisors is an integer number (20159584).

Almost surely, 2^78118357 is an apocalyptic number.

It is an amenable number.

78118357 is a deficient number, since it is larger than the sum of its proper divisors (2519979).

78118357 is a wasteful number, since it uses less digits than its factorization.

78118357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2519978.

The product of its digits is 47040, while the sum is 40.

The square root of 78118357 is about 8838.4589720154. The cubic root of 78118357 is about 427.4818696642.

The spelling of 78118357 in words is "seventy-eight million, one hundred eighteen thousand, three hundred fifty-seven".