78971450 has 12 divisors (see below), whose sum is σ = 146886990. Its totient is φ = 31588560.

The previous prime is 78971449. The next prime is 78971479. The reversal of 78971450 is 5417987.

It can be written as a sum of positive squares in 3 ways, for example, as 41357761 + 37613689 = 6431^2 + 6133^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78971398 and 78971407.

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, 789665 + ... + 789764.

Almost surely, 2^78971450 is an apocalyptic number.

78971450 is a deficient number, since it is larger than the sum of its proper divisors (67915540).

78971450 is a wasteful number, since it uses less digits than its factorization.

78971450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579441 (or 1579436 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 78971450 is about 8886.5882092061. The cubic root of 78971450 is about 429.0323472366.

The spelling of 78971450 in words is "seventy-eight million, nine hundred seventy-one thousand, four hundred fifty".