78487506 has 12 divisors (see below), whose sum is σ = 170056302. Its totient is φ = 26162496.

The previous prime is 78487481. The next prime is 78487511. The reversal of 78487506 is 60578487.

It can be written as a sum of positive squares in only one way, i.e., 78481881 + 5625 = 8859^2 + 75^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2180191 + ... + 2180226.

Almost surely, 2^78487506 is an apocalyptic number.

78487506 is an abundant number, since it is smaller than the sum of its proper divisors (91568796).

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

78487506 is a wasteful number, since it uses less digits than its factorization.

78487506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4360425 (or 4360422 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 78487506 is about 8859.3174680672. The cubic root of 78487506 is about 428.1541682651.

The spelling of 78487506 in words is "seventy-eight million, four hundred eighty-seven thousand, five hundred six".