78650880 has 480 divisors, whose sum is σ = 335871360. Its totient is φ = 15482880.

The previous prime is 78650879. The next prime is 78650893. The reversal of 78650880 is 8805687.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4139511 + ... + 4139529.

It is an arithmetic number, because the mean of its divisors is an integer number (699732).

Almost surely, 2^78650880 is an apocalyptic number.

78650880 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 78650880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167935680).

78650880 is an abundant number, since it is smaller than the sum of its proper divisors (257220480).

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

78650880 is a wasteful number, since it uses less digits than its factorization.

78650880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 42.

The square root of 78650880 is about 8868.5331368835. The cubic root of 78650880 is about 428.4510341184.

The spelling of 78650880 in words is "seventy-eight million, six hundred fifty thousand, eight hundred eighty".