78470420 has 24 divisors (see below), whose sum is σ = 188329344. Its totient is φ = 26904096.

The previous prime is 78470417. The next prime is 78470423. The reversal of 78470420 is 2407487.

It is an interprime number because it is at equal distance from previous prime (78470417) and next prime (78470423).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78470423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280112 + ... + 280391.

It is an arithmetic number, because the mean of its divisors is an integer number (7847056).

Almost surely, 2^78470420 is an apocalyptic number.

78470420 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78470420 is an abundant number, since it is smaller than the sum of its proper divisors (109858924).

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

78470420 is a wasteful number, since it uses less digits than its factorization.

78470420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560519 (or 560517 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 78470420 is about 8858.3531200782. The cubic root of 78470420 is about 428.1230976171.

The spelling of 78470420 in words is "seventy-eight million, four hundred seventy thousand, four hundred twenty".