78500142 has 24 divisors (see below), whose sum is σ = 194381616. Its totient is φ = 22428576.

The previous prime is 78500137. The next prime is 78500159. The reversal of 78500142 is 24100587.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 311383 + ... + 311634.

It is an arithmetic number, because the mean of its divisors is an integer number (8099234).

Almost surely, 2^78500142 is an apocalyptic number.

78500142 is an abundant number, since it is smaller than the sum of its proper divisors (115881474).

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

78500142 is a wasteful number, since it uses less digits than its factorization.

78500142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623032 (or 623029 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 78500142 is about 8860.0305868547. The cubic root of 78500142 is about 428.1771437510.

The spelling of 78500142 in words is "seventy-eight million, five hundred thousand, one hundred forty-two".