78227120 has 40 divisors (see below), whose sum is σ = 183567120. Its totient is φ = 31000320.

The previous prime is 78227119. The next prime is 78227147. The reversal of 78227120 is 2172287.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×78227120² = 12238964606988800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4235 + ... + 13205.

It is an arithmetic number, because the mean of its divisors is an integer number (4589178).

Almost surely, 2^78227120 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 78227120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91783560).

78227120 is an abundant number, since it is smaller than the sum of its proper divisors (105340000).

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

78227120 is a wasteful number, since it uses less digits than its factorization.

78227120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9093 (or 9087 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 78227120 is about 8844.6096578651. The cubic root of 78227120 is about 427.6801698304.

The spelling of 78227120 in words is "seventy-eight million, two hundred twenty-seven thousand, one hundred twenty".