78623100 has 54 divisors (see below), whose sum is σ = 246442560. Its totient is φ = 20965920.

The previous prime is 78623063. The next prime is 78623101. The reversal of 78623100 is 132687.

It is a super-2 number, since 2×78623100² = 12363183707220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78623101) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 42780 + ... + 44579.

Almost surely, 2^78623100 is an apocalyptic number.

It is an amenable number.

78623100 is an abundant number, since it is smaller than the sum of its proper divisors (167819460).

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

78623100 is a wasteful number, since it uses less digits than its factorization.

78623100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87379 (or 87369 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 78623100 is about 8866.9667869007. The cubic root of 78623100 is about 428.4005842852.

Adding to 78623100 its reverse (132687), we get a palindrome (78755787).

The spelling of 78623100 in words is "seventy-eight million, six hundred twenty-three thousand, one hundred".