78570855 has 48 divisors (see below), whose sum is σ = 157326624. Its totient is φ = 35850240.

The previous prime is 78570853. The next prime is 78570859. The reversal of 78570855 is 55807587.

It is a happy number.

78570855 is a `hidden beast` number, since 78 + 570 + 8 + 5 + 5 = 666.

It is not a de Polignac number, because 78570855 - 2¹ = 78570853 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 78570855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78570853) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3747 + ... + 13083.

It is an arithmetic number, because the mean of its divisors is an integer number (3277638).

Almost surely, 2^78570855 is an apocalyptic number.

78570855 is an abundant number, since it is smaller than the sum of its proper divisors (78755769).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78570855 is a wasteful number, since it uses less digits than its factorization.

78570855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9376 (or 9373 counting only the distinct ones).

The product of its (nonzero) digits is 392000, while the sum is 45.

The square root of 78570855 is about 8864.0202504281. The cubic root of 78570855 is about 428.3056726205.

The spelling of 78570855 in words is "seventy-eight million, five hundred seventy thousand, eight hundred fifty-five".