78550900 has 36 divisors (see below), whose sum is σ = 175960960. Its totient is φ = 30405600.

The previous prime is 78550873. The next prime is 78550903. The reversal of 78550900 is 905587.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78550903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9570 + ... + 15769.

Almost surely, 2^78550900 is an apocalyptic number.

It is an amenable number.

78550900 is an abundant number, since it is smaller than the sum of its proper divisors (97410060).

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

78550900 is a wasteful number, since it uses less digits than its factorization.

78550900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25384 (or 25377 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 78550900 is about 8862.8945610337. The cubic root of 78550900 is about 428.2694099658.

The spelling of 78550900 in words is "seventy-eight million, five hundred fifty thousand, nine hundred".