78203150 has 12 divisors (see below), whose sum is σ = 145457952. Its totient is φ = 31281240.

The previous prime is 78203149. The next prime is 78203161. The reversal of 78203150 is 5130287.

It is a super-2 number, since 2×78203150² = 12231465339845000, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 781982 + ... + 782081.

It is an arithmetic number, because the mean of its divisors is an integer number (12121496).

Almost surely, 2^78203150 is an apocalyptic number.

78203150 is a deficient number, since it is larger than the sum of its proper divisors (67254802).

78203150 is a wasteful number, since it uses less digits than its factorization.

78203150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564075 (or 1564070 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 78203150 is about 8843.2544914189. The cubic root of 78203150 is about 427.6364827607.

The spelling of 78203150 in words is "seventy-eight million, two hundred three thousand, one hundred fifty".