78387396 has 12 divisors (see below), whose sum is σ = 182903952. Its totient is φ = 26129128.

The previous prime is 78387389. The next prime is 78387457. The reversal of 78387396 is 69378387.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×78387396² = 12289167703321632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3266130 + ... + 3266153.

It is an arithmetic number, because the mean of its divisors is an integer number (15241996).

Almost surely, 2^78387396 is an apocalyptic number.

It is an amenable number.

78387396 is an abundant number, since it is smaller than the sum of its proper divisors (104516556).

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

78387396 is a wasteful number, since it uses less digits than its factorization.

78387396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6532290 (or 6532288 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 51.

The square root of 78387396 is about 8853.6656815129. The cubic root of 78387396 is about 427.9720554149.

Subtracting from 78387396 its reverse (69378387), we obtain a palindrome (9009009).

The spelling of 78387396 in words is "seventy-eight million, three hundred eighty-seven thousand, three hundred ninety-six".