78240233 has 8 divisors (see below), whose sum is σ = 82776000. Its totient is φ = 73746288.

The previous prime is 78240223. The next prime is 78240241. The reversal of 78240233 is 33204287.

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

It is a cyclic number.

It is not a de Polignac number, because 78240233 - 2⁸ = 78239977 is a prime.

It is a super-2 number, since 2×78240233² = 12243068119788578, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78240196 and 78240205.

It is not an unprimeable number, because it can be changed into a prime (78240203) 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, 6566 + ... + 14127.

It is an arithmetic number, because the mean of its divisors is an integer number (10347000).

Almost surely, 2^78240233 is an apocalyptic number.

It is an amenable number.

78240233 is a deficient number, since it is larger than the sum of its proper divisors (4535767).

78240233 is a wasteful number, since it uses less digits than its factorization.

78240233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20911.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 78240233 is about 8845.3509257689. The cubic root of 78240233 is about 427.7040654510.

The spelling of 78240233 in words is "seventy-eight million, two hundred forty thousand, two hundred thirty-three".