78162733 has 6 divisors (see below), whose sum is σ = 85914542. Its totient is φ = 71056920.

The previous prime is 78162727. The next prime is 78162793. The reversal of 78162733 is 33726187.

It can be written as a sum of positive squares in only one way, i.e., 43270084 + 34892649 = 6578^2 + 5907^2 .

It is not a de Polignac number, because 78162733 - 2¹³ = 78154541 is a prime.

It is a super-2 number, since 2×78162733² = 12218825660058578, 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 = 78162692 and 78162701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78162703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 322866 + ... + 323107.

Almost surely, 2^78162733 is an apocalyptic number.

It is an amenable number.

78162733 is a deficient number, since it is larger than the sum of its proper divisors (7751809).

78162733 is a wasteful number, since it uses less digits than its factorization.

78162733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645995 (or 645984 counting only the distinct ones).

The product of its digits is 42336, while the sum is 37.

The square root of 78162733 is about 8840.9690079764. The cubic root of 78162733 is about 427.5627996158.

The spelling of 78162733 in words is "seventy-eight million, one hundred sixty-two thousand, seven hundred thirty-three".