78861024 has 216 divisors, whose sum is σ = 257939136. Its totient is φ = 22809600.

The previous prime is 78861007. The next prime is 78861053. The reversal of 78861024 is 42016887.

It is a super-2 number, since 2×78861024² = 12438122212657152, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 78861024.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1080252 + ... + 1080324.

Almost surely, 2^78861024 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 78861024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128969568).

78861024 is an abundant number, since it is smaller than the sum of its proper divisors (179078112).

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

78861024 is a wasteful number, since it uses less digits than its factorization.

78861024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 78861024 is about 8880.3729651406. The cubic root of 78861024 is about 428.8322815787.

The spelling of 78861024 in words is "seventy-eight million, eight hundred sixty-one thousand, twenty-four".