78995450 has 12 divisors (see below), whose sum is σ = 146931630. Its totient is φ = 31598160.

The previous prime is 78995443. The next prime is 78995453. The reversal of 78995450 is 5459987.

It can be written as a sum of positive squares in 3 ways, for example, as 66961489 + 12033961 = 8183^2 + 3469^2 .

It is a super-2 number, since 2×78995450² = 12480562241405000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 78995395 and 78995404.

It is not an unprimeable number, because it can be changed into a prime (78995453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 789905 + ... + 790004.

Almost surely, 2^78995450 is an apocalyptic number.

78995450 is a deficient number, since it is larger than the sum of its proper divisors (67936180).

78995450 is a wasteful number, since it uses less digits than its factorization.

78995450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579921 (or 1579916 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 47.

The square root of 78995450 is about 8887.9384561326. The cubic root of 78995450 is about 429.0758048550.

The spelling of 78995450 in words is "seventy-eight million, nine hundred ninety-five thousand, four hundred fifty".