78266738 has 32 divisors (see below), whose sum is σ = 136088640. Its totient is φ = 33384960.

The previous prime is 78266717. The next prime is 78266761. The reversal of 78266738 is 83766287.

It is a super-2 number, since 2×78266738² = 12251364554321288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78266692 and 78266701.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46406 + ... + 48062.

It is an arithmetic number, because the mean of its divisors is an integer number (4252770).

Almost surely, 2^78266738 is an apocalyptic number.

78266738 is a deficient number, since it is larger than the sum of its proper divisors (57821902).

78266738 is a wasteful number, since it uses less digits than its factorization.

78266738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1802.

The product of its digits is 677376, while the sum is 47.

The square root of 78266738 is about 8846.8490435861. The cubic root of 78266738 is about 427.7523569584.

The spelling of 78266738 in words is "seventy-eight million, two hundred sixty-six thousand, seven hundred thirty-eight".