78961250 has 40 divisors (see below), whose sum is σ = 149249100. Its totient is φ = 31320000.

The previous prime is 78961249. The next prime is 78961271. The reversal of 78961250 is 5216987.

It can be written as a sum of positive squares in 10 ways, for example, as 18292729 + 60668521 = 4277^2 + 7789^2 .

It is an alternating number because its digits alternate between odd and even.

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 19 ways as a sum of consecutive naturals, for example, 226076 + ... + 226424.

Almost surely, 2^78961250 is an apocalyptic number.

78961250 is a deficient number, since it is larger than the sum of its proper divisors (70287850).

78961250 is a wasteful number, since it uses less digits than its factorization.

78961250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 78961250 is about 8886.0142921335. The cubic root of 78961250 is about 429.0138750826.

The spelling of 78961250 in words is "seventy-eight million, nine hundred sixty-one thousand, two hundred fifty".