78412785 has 16 divisors (see below), whose sum is σ = 136866240. Its totient is φ = 38018240.

The previous prime is 78412777. The next prime is 78412799. The reversal of 78412785 is 58721487.

It is not a de Polignac number, because 78412785 - 2³ = 78412777 is a prime.

It is a super-2 number, since 2×78412785² = 12297129702912450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237450 + ... + 237779.

It is an arithmetic number, because the mean of its divisors is an integer number (8554140).

Almost surely, 2^78412785 is an apocalyptic number.

It is an amenable number.

78412785 is a deficient number, since it is larger than the sum of its proper divisors (58453455).

78412785 is a wasteful number, since it uses less digits than its factorization.

78412785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475248.

The product of its digits is 125440, while the sum is 42.

The square root of 78412785 is about 8855.0993783243. The cubic root of 78412785 is about 428.0182559104.

It can be divided in two parts, 78412 and 785, that added together give a palindrome (79197).

The spelling of 78412785 in words is "seventy-eight million, four hundred twelve thousand, seven hundred eighty-five".