78470140 has 24 divisors (see below), whose sum is σ = 188328672. Its totient is φ = 26904000.

The previous prime is 78470131. The next prime is 78470159. The reversal of 78470140 is 4107487.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280111 + ... + 280390.

It is an arithmetic number, because the mean of its divisors is an integer number (7847028).

Almost surely, 2^78470140 is an apocalyptic number.

78470140 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78470140 is an abundant number, since it is smaller than the sum of its proper divisors (109858532).

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

78470140 is a wasteful number, since it uses less digits than its factorization.

78470140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560517 (or 560515 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 78470140 is about 8858.3373157721. The cubic root of 78470140 is about 428.1225884035.

The spelling of 78470140 in words is "seventy-eight million, four hundred seventy thousand, one hundred forty".