78598520 has 192 divisors, whose sum is σ = 240330240. Its totient is φ = 22464000.

The previous prime is 78598519. The next prime is 78598529. The reversal of 78598520 is 2589587.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78598529) 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, 520445 + ... + 520595.

It is an arithmetic number, because the mean of its divisors is an integer number (1251720).

Almost surely, 2^78598520 is an apocalyptic number.

78598520 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78598520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120165120).

78598520 is an abundant number, since it is smaller than the sum of its proper divisors (161731720).

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

78598520 is a wasteful number, since it uses less digits than its factorization.

78598520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 44.

The square root of 78598520 is about 8865.5806352432. The cubic root of 78598520 is about 428.3559358977.

The spelling of 78598520 in words is "seventy-eight million, five hundred ninety-eight thousand, five hundred twenty".