78260642 has 8 divisors (see below), whose sum is σ = 117766956. Its totient is φ = 39004992.

The previous prime is 78260629. The next prime is 78260657. The reversal of 78260642 is 24606287.

It can be written as a sum of positive squares in 2 ways, for example, as 50708641 + 27552001 = 7121^2 + 5249^2 .

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

It is a super-2 number, since 2×78260642² = 12249456172504328, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 61883 + ... + 63134.

Almost surely, 2^78260642 is an apocalyptic number.

78260642 is a deficient number, since it is larger than the sum of its proper divisors (39506314).

78260642 is a wasteful number, since it uses less digits than its factorization.

78260642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125332.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 78260642 is about 8846.5045074312. The cubic root of 78260642 is about 427.7412511505.

The spelling of 78260642 in words is "seventy-eight million, two hundred sixty thousand, six hundred forty-two".