78202801 has 4 divisors (see below), whose sum is σ = 80725504. Its totient is φ = 75680100.

The previous prime is 78202759. The next prime is 78202819. The reversal of 78202801 is 10820287.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10820287 = 233 ⋅46439.

It is a cyclic number.

It is not a de Polignac number, because 78202801 - 2¹¹ = 78200753 is a prime.

It is a super-2 number, since 2×78202801² = 12231356168491202, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78202801.

It is not an unprimeable number, because it can be changed into a prime (78292801) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1261305 + ... + 1261366.

It is an arithmetic number, because the mean of its divisors is an integer number (20181376).

Almost surely, 2^78202801 is an apocalyptic number.

It is an amenable number.

78202801 is a deficient number, since it is larger than the sum of its proper divisors (2522703).

78202801 is a wasteful number, since it uses less digits than its factorization.

78202801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2522702.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 78202801 is about 8843.2347588425. The cubic root of 78202801 is about 427.6358466169.

It can be divided in two parts, 78202 and 801, that added together give a triangular number (79003 = T₃₉₇).

The spelling of 78202801 in words is "seventy-eight million, two hundred two thousand, eight hundred one".