78245870 has 8 divisors (see below), whose sum is σ = 140842584. Its totient is φ = 31298344.

The previous prime is 78245851. The next prime is 78245873. The reversal of 78245870 is 7854287.

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

It is a super-2 number, since 2×78245870² = 12244832344113800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78245873) 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, 3912284 + ... + 3912303.

It is an arithmetic number, because the mean of its divisors is an integer number (17605323).

Almost surely, 2^78245870 is an apocalyptic number.

78245870 is a deficient number, since it is larger than the sum of its proper divisors (62596714).

78245870 is a wasteful number, since it uses less digits than its factorization.

78245870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7824594.

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 78245870 is about 8845.6695619947. The cubic root of 78245870 is about 427.7143368498.

The spelling of 78245870 in words is "seventy-eight million, two hundred forty-five thousand, eight hundred seventy".