78313100 has 18 divisors (see below), whose sum is σ = 169939644. Its totient is φ = 31325200.

The previous prime is 78313093. The next prime is 78313129. The reversal of 78313100 is 131387.

It is a happy number.

It is a super-2 number, since 2×78313100² = 12265883263220000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 391466 + ... + 391665.

Almost surely, 2^78313100 is an apocalyptic number.

It is an amenable number.

78313100 is an abundant number, since it is smaller than the sum of its proper divisors (91626544).

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

78313100 is a wasteful number, since it uses less digits than its factorization.

78313100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783145 (or 783138 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 78313100 is about 8849.4689106183. The cubic root of 78313100 is about 427.8368012609.

Adding to 78313100 its reverse (131387), we get a palindrome (78444487).

The spelling of 78313100 in words is "seventy-eight million, three hundred thirteen thousand, one hundred".