78299136 has 150 divisors (see below), whose sum is σ = 237888420. Its totient is φ = 25657344.

The previous prime is 78299099. The next prime is 78299201. The reversal of 78299136 is 63199287.

It is a super-2 number, since 2×78299136² = 12261509396692992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78299091 and 78299100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1327075 + ... + 1327133.

Almost surely, 2^78299136 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 78299136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118944210).

78299136 is an abundant number, since it is smaller than the sum of its proper divisors (159589284).

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

78299136 is an frugal number, since it uses more digits than its factorization.

78299136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99 (or 64 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 78299136 is about 8848.6799015446. The cubic root of 78299136 is about 427.8113705721.

The spelling of 78299136 in words is "seventy-eight million, two hundred ninety-nine thousand, one hundred thirty-six".