78331357 has 16 divisors (see below), whose sum is σ = 89172160. Its totient is φ = 68211072.

The previous prime is 78331343. The next prime is 78331367. The reversal of 78331357 is 75313387.

It is a cyclic number.

It is not a de Polignac number, because 78331357 - 2⁷ = 78331229 is a prime.

It is a super-2 number, since 2×78331357² = 12271602978922898, 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 (78331367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75313 + ... + 76345.

It is an arithmetic number, because the mean of its divisors is an integer number (5573260).

Almost surely, 2^78331357 is an apocalyptic number.

It is an amenable number.

78331357 is a deficient number, since it is larger than the sum of its proper divisors (10840803).

78331357 is a wasteful number, since it uses less digits than its factorization.

78331357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372.

The product of its digits is 52920, while the sum is 37.

The square root of 78331357 is about 8850.5003813344. The cubic root of 78331357 is about 427.8700456332.

The spelling of 78331357 in words is "seventy-eight million, three hundred thirty-one thousand, three hundred fifty-seven".