78202261 has 8 divisors (see below), whose sum is σ = 83121984. Its totient is φ = 73318080.

The previous prime is 78202247. The next prime is 78202279. The reversal of 78202261 is 16220287.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78202261 is a prime.

It is a super-2 number, since 2×78202261² = 12231187251024242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78202361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4275 + ... + 13216.

It is an arithmetic number, because the mean of its divisors is an integer number (10390248).

Almost surely, 2^78202261 is an apocalyptic number.

It is an amenable number.

78202261 is a deficient number, since it is larger than the sum of its proper divisors (4919723).

78202261 is a wasteful number, since it uses less digits than its factorization.

78202261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17771.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 78202261 is about 8843.2042269756. The cubic root of 78202261 is about 427.6348623219.

The spelling of 78202261 in words is "seventy-eight million, two hundred two thousand, two hundred sixty-one".