78356031 has 32 divisors (see below), whose sum is σ = 115519488. Its totient is φ = 46949760.

The previous prime is 78356029. The next prime is 78356039. The reversal of 78356031 is 13065387.

It is a happy number.

It is not a de Polignac number, because 78356031 - 2¹ = 78356029 is a prime.

It is a super-3 number, since 3×78356031³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 78355983 and 78356001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78356039) 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 31 ways as a sum of consecutive naturals, for example, 410146 + ... + 410336.

It is an arithmetic number, because the mean of its divisors is an integer number (3609984).

Almost surely, 2^78356031 is an apocalyptic number.

78356031 is a deficient number, since it is larger than the sum of its proper divisors (37163457).

78356031 is a wasteful number, since it uses less digits than its factorization.

78356031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 78356031 is about 8851.8942040673. The cubic root of 78356031 is about 427.9149665845.

The spelling of 78356031 in words is "seventy-eight million, three hundred fifty-six thousand, thirty-one".