123878780 has 24 divisors (see below), whose sum is σ = 261515520. Its totient is φ = 49290560.

The previous prime is 123878771. The next prime is 123878857. The reversal of 123878780 is 87878321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12395 + ... + 20034.

It is an arithmetic number, because the mean of its divisors is an integer number (10896480).

Almost surely, 2^123878780 is an apocalyptic number.

123878780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123878780 is an abundant number, since it is smaller than the sum of its proper divisors (137636740).

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

123878780 is a wasteful number, since it uses less digits than its factorization.

123878780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32629 (or 32627 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 44.

The square root of 123878780 is about 11130.0844561036. The cubic root of 123878780 is about 498.5005477812.

The spelling of 123878780 in words is "one hundred twenty-three million, eight hundred seventy-eight thousand, seven hundred eighty".