78205250 has 32 divisors (see below), whose sum is σ = 151137792. Its totient is φ = 30270000.

The previous prime is 78205201. The next prime is 78205271. The reversal of 78205250 is 5250287.

It is a super-2 number, since 2×78205250² = 12232122255125000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2705 + ... + 12795.

It is an arithmetic number, because the mean of its divisors is an integer number (4723056).

Almost surely, 2^78205250 is an apocalyptic number.

78205250 is a deficient number, since it is larger than the sum of its proper divisors (72932542).

78205250 is a wasteful number, since it uses less digits than its factorization.

78205250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10139 (or 10129 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 78205250 is about 8843.3732251896. The cubic root of 78205250 is about 427.6403105204.

The spelling of 78205250 in words is "seventy-eight million, two hundred five thousand, two hundred fifty".