78140000 has 60 divisors (see below), whose sum is σ = 192285324. Its totient is φ = 31248000.

The previous prime is 78139931. The next prime is 78140009. The reversal of 78140000 is 4187.

It is a happy number.

It is a super-2 number, since 2×78140000² = 12211719200000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78140009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 18047 + ... + 21953.

Almost surely, 2^78140000 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 78140000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96142662).

78140000 is an abundant number, since it is smaller than the sum of its proper divisors (114145324).

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

78140000 is an equidigital number, since it uses as much as digits as its factorization.

78140000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3937 (or 3914 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 78140000 is about 8839.6832522438. The cubic root of 78140000 is about 427.5213445335.

Adding to 78140000 its reverse (4187), we get a palindrome (78144187).

The spelling of 78140000 in words is "seventy-eight million, one hundred forty thousand".