78007240 has 16 divisors (see below), whose sum is σ = 175516380. Its totient is φ = 31202880.

The previous prime is 78007219. The next prime is 78007273. The reversal of 78007240 is 4270087.

It can be written as a sum of positive squares in 2 ways, for example, as 71132356 + 6874884 = 8434^2 + 2622^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78007199 and 78007208.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 975051 + ... + 975130.

Almost surely, 2^78007240 is an apocalyptic number.

It is an amenable number.

78007240 is an abundant number, since it is smaller than the sum of its proper divisors (97509140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78007240 is a wasteful number, since it uses less digits than its factorization.

78007240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1950192 (or 1950188 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 78007240 is about 8832.1707411032. The cubic root of 78007240 is about 427.2790874398.

The spelling of 78007240 in words is "seventy-eight million, seven thousand, two hundred forty".