78268646 has 8 divisors (see below), whose sum is σ = 124309080. Its totient is φ = 36832288.

The previous prime is 78268639. The next prime is 78268667. The reversal of 78268646 is 64686287.

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

It is a super-2 number, since 2×78268646² = 12251961893346632, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78268646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1150976 + ... + 1151043.

It is an arithmetic number, because the mean of its divisors is an integer number (15538635).

Almost surely, 2^78268646 is an apocalyptic number.

78268646 is a deficient number, since it is larger than the sum of its proper divisors (46040434).

78268646 is a wasteful number, since it uses less digits than its factorization.

78268646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302038.

The product of its digits is 774144, while the sum is 47.

The square root of 78268646 is about 8846.9568779327. The cubic root of 78268646 is about 427.7558328704.

The spelling of 78268646 in words is "seventy-eight million, two hundred sixty-eight thousand, six hundred forty-six".