78028031 has 8 divisors (see below), whose sum is σ = 80850960. Its totient is φ = 75255232.

The previous prime is 78028019. The next prime is 78028033. The reversal of 78028031 is 13082087.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78028031 is a prime.

It is a super-2 number, since 2×78028031² = 12176747243473922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78027985 and 78028003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78028033) 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 7 ways as a sum of consecutive naturals, for example, 9350 + ... + 15603.

It is an arithmetic number, because the mean of its divisors is an integer number (10106370).

Almost surely, 2^78028031 is an apocalyptic number.

78028031 is a deficient number, since it is larger than the sum of its proper divisors (2822929).

78028031 is a wasteful number, since it uses less digits than its factorization.

78028031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25065.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 78028031 is about 8833.3476666550. The cubic root of 78028031 is about 427.3170444738.

The spelling of 78028031 in words is "seventy-eight million, twenty-eight thousand, thirty-one".