78200534 has 8 divisors (see below), whose sum is σ = 117563400. Its totient is φ = 39012736.

The previous prime is 78200533. The next prime is 78200539. The reversal of 78200534 is 43500287.

It is a happy number.

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

It is a super-2 number, since 2×78200534² = 12230647035770312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78200497 and 78200506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78200533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42644 + ... + 44439.

It is an arithmetic number, because the mean of its divisors is an integer number (14695425).

Almost surely, 2^78200534 is an apocalyptic number.

78200534 is a deficient number, since it is larger than the sum of its proper divisors (39362866).

78200534 is a wasteful number, since it uses less digits than its factorization.

78200534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87534.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 78200534 is about 8843.1065808346. The cubic root of 78200534 is about 427.6317143701.

The spelling of 78200534 in words is "seventy-eight million, two hundred thousand, five hundred thirty-four".