78444070 has 32 divisors (see below), whose sum is σ = 148581216. Its totient is φ = 29779200.

The previous prime is 78444061. The next prime is 78444073. The reversal of 78444070 is 7044487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78444073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12585 + ... + 17755.

It is an arithmetic number, because the mean of its divisors is an integer number (4643163).

Almost surely, 2^78444070 is an apocalyptic number.

78444070 is a deficient number, since it is larger than the sum of its proper divisors (70137146).

78444070 is a wasteful number, since it uses less digits than its factorization.

78444070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5256.

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 78444070 is about 8856.8656984285. The cubic root of 78444070 is about 428.0751716743.

The spelling of 78444070 in words is "seventy-eight million, four hundred forty-four thousand, seventy".