78307642 has 8 divisors (see below), whose sum is σ = 134241696. Its totient is φ = 33560412.

The previous prime is 78307639. The next prime is 78307673. The reversal of 78307642 is 24670387.

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

It is a super-2 number, since 2×78307642² = 12264173591200328, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2796688 + ... + 2796715.

It is an arithmetic number, because the mean of its divisors is an integer number (16780212).

Almost surely, 2^78307642 is an apocalyptic number.

78307642 is a deficient number, since it is larger than the sum of its proper divisors (55934054).

78307642 is a wasteful number, since it uses less digits than its factorization.

78307642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5593412.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 78307642 is about 8849.1605251572. The cubic root of 78307642 is about 427.8268617254.

It can be divided in two parts, 78 and 307642, that added together give a triangular number (307720 = T₇₈₄).

The spelling of 78307642 in words is "seventy-eight million, three hundred seven thousand, six hundred forty-two".