78554580 has 144 divisors (see below), whose sum is σ = 243984384. Its totient is φ = 18869760.

The previous prime is 78554573. The next prime is 78554587. The reversal of 78554580 is 8545587.

It is an interprime number because it is at equal distance from previous prime (78554573) and next prime (78554587).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78554587) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 618477 + ... + 618603.

It is an arithmetic number, because the mean of its divisors is an integer number (1694336).

Almost surely, 2^78554580 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78554580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121992192).

78554580 is an abundant number, since it is smaller than the sum of its proper divisors (165429804).

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

78554580 is a wasteful number, since it uses less digits than its factorization.

78554580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 224000, while the sum is 42.

The square root of 78554580 is about 8863.1021657205. The cubic root of 78554580 is about 428.2760978026.

The spelling of 78554580 in words is "seventy-eight million, five hundred fifty-four thousand, five hundred eighty".