78274642 has 8 divisors (see below), whose sum is σ = 123591600. Its totient is φ = 37077444.

The previous prime is 78274639. The next prime is 78274649. The reversal of 78274642 is 24647287.

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

It is a super-2 number, since 2×78274642² = 12253839160456328, which contains 22 as substring.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 78274595 and 78274604.

It is not an unprimeable number, because it can be changed into a prime (78274649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1029892 + ... + 1029967.

It is an arithmetic number, because the mean of its divisors is an integer number (15448950).

Almost surely, 2^78274642 is an apocalyptic number.

78274642 is a deficient number, since it is larger than the sum of its proper divisors (45316958).

78274642 is a wasteful number, since it uses less digits than its factorization.

78274642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2059880.

The product of its digits is 150528, while the sum is 40.

The square root of 78274642 is about 8847.2957450285. The cubic root of 78274642 is about 427.7667557563.

The spelling of 78274642 in words is "seventy-eight million, two hundred seventy-four thousand, six hundred forty-two".