78164470 has 16 divisors (see below), whose sum is σ = 148972608. Its totient is φ = 29426560.

The previous prime is 78164447. The next prime is 78164477. The reversal of 78164470 is 7446187.

It is a super-2 number, since 2×78164470² = 12219368740761800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78164477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229726 + ... + 230065.

It is an arithmetic number, because the mean of its divisors is an integer number (9310788).

Almost surely, 2^78164470 is an apocalyptic number.

78164470 is a deficient number, since it is larger than the sum of its proper divisors (70808138).

78164470 is a wasteful number, since it uses less digits than its factorization.

78164470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459815.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 78164470 is about 8841.0672432688. The cubic root of 78164470 is about 427.5659668160.

The spelling of 78164470 in words is "seventy-eight million, one hundred sixty-four thousand, four hundred seventy".