78012207 has 32 divisors (see below), whose sum is σ = 142248960. Its totient is φ = 41148000.

The previous prime is 78012199. The next prime is 78012211. The reversal of 78012207 is 70221087.

It is not a de Polignac number, because 78012207 - 2³ = 78012199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78012257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13419 + ... + 18332.

It is an arithmetic number, because the mean of its divisors is an integer number (4445280).

Almost surely, 2^78012207 is an apocalyptic number.

78012207 is a deficient number, since it is larger than the sum of its proper divisors (64236753).

78012207 is a wasteful number, since it uses less digits than its factorization.

78012207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31780 (or 31774 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 78012207 is about 8832.4519245790. The cubic root of 78012207 is about 427.2881560433.

The spelling of 78012207 in words is "seventy-eight million, twelve thousand, two hundred seven".