78252619 has 8 divisors (see below), whose sum is σ = 79037568. Its totient is φ = 77471040.

The previous prime is 78252611. The next prime is 78252623. The reversal of 78252619 is 91625287.

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

It is a cyclic number.

It is not a de Polignac number, because 78252619 - 2³ = 78252611 is a prime.

It is a super-2 number, since 2×78252619² = 12246944760718322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78252611) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 82689 + ... + 83629.

It is an arithmetic number, because the mean of its divisors is an integer number (9879696).

Almost surely, 2^78252619 is an apocalyptic number.

78252619 is a deficient number, since it is larger than the sum of its proper divisors (784949).

78252619 is a wasteful number, since it uses less digits than its factorization.

78252619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685.

The product of its digits is 60480, while the sum is 40.

The square root of 78252619 is about 8846.0510398708. The cubic root of 78252619 is about 427.7266338186.

The spelling of 78252619 in words is "seventy-eight million, two hundred fifty-two thousand, six hundred nineteen".