78772250 has 32 divisors (see below), whose sum is σ = 147992832. Its totient is φ = 31395600.

The previous prime is 78772241. The next prime is 78772283. The reversal of 78772250 is 5227787.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121427 + ... + 122073.

It is an arithmetic number, because the mean of its divisors is an integer number (4624776).

Almost surely, 2^78772250 is an apocalyptic number.

78772250 is a deficient number, since it is larger than the sum of its proper divisors (69220582).

78772250 is a wasteful number, since it uses less digits than its factorization.

78772250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151 (or 1141 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 38.

The square root of 78772250 is about 8875.3732315886. The cubic root of 78772250 is about 428.6713087313.

It can be divided in two parts, 787 and 72250, that added together give a palindrome (73037).

The spelling of 78772250 in words is "seventy-eight million, seven hundred seventy-two thousand, two hundred fifty".