878123298840 has 32 divisors (see below), whose sum is σ = 2634369896880. Its totient is φ = 234166212992.

The previous prime is 878123298809. The next prime is 878123298841. The reversal of 878123298840 is 48892321878.

It is a super-2 number, since 2×878123298840² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878123298841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3658846959 + ... + 3658847198.

Almost surely, 2^878123298840 is an apocalyptic number.

It is an amenable number.

878123298840 is an abundant number, since it is smaller than the sum of its proper divisors (1756246598040).

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

878123298840 is a wasteful number, since it uses less digits than its factorization.

878123298840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7317694171 (or 7317694167 counting only the distinct ones).

The product of its (nonzero) digits is 12386304, while the sum is 60.

The spelling of 878123298840 in words is "eight hundred seventy-eight billion, one hundred twenty-three million, two hundred ninety-eight thousand, eight hundred forty".