78199040 has 72 divisors (see below), whose sum is σ = 188865600. Its totient is φ = 31021056.

The previous prime is 78199027. The next prime is 78199067. The reversal of 78199040 is 4099187.

It is a super-2 number, since 2×78199040² = 12230179713843200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78198985 and 78199003.

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, 254567 + ... + 254873.

Almost surely, 2^78199040 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 78199040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94432800).

78199040 is an abundant number, since it is smaller than the sum of its proper divisors (110666560).

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

78199040 is a wasteful number, since it uses less digits than its factorization.

78199040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 78199040 is about 8843.0221078543. The cubic root of 78199040 is about 427.6289910901.

The spelling of 78199040 in words is "seventy-eight million, one hundred ninety-nine thousand, forty".