78550234 has 24 divisors (see below), whose sum is σ = 145127700. Its totient is φ = 31683456.

The previous prime is 78550231. The next prime is 78550247. The reversal of 78550234 is 43205587.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 74736025 + 3814209 = 8645^2 + 1953^2 .

It is a super-2 number, since 2×78550234² = 12340278522909512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 78550234.

It is not an unprimeable number, because it can be changed into a prime (78550231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21909 + ... + 25240.

Almost surely, 2^78550234 is an apocalyptic number.

78550234 is a deficient number, since it is larger than the sum of its proper divisors (66577466).

78550234 is a wasteful number, since it uses less digits than its factorization.

78550234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47182 (or 47175 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 78550234 is about 8862.8569885788. The cubic root of 78550234 is about 428.2681995904.

The spelling of 78550234 in words is "seventy-eight million, five hundred fifty thousand, two hundred thirty-four".