123178040 has 16 divisors (see below), whose sum is σ = 277150680. Its totient is φ = 49271200.

The previous prime is 123178037. The next prime is 123178043. The reversal of 123178040 is 40871321.

It is an interprime number because it is at equal distance from previous prime (123178037) and next prime (123178043).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123178043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1539686 + ... + 1539765.

Almost surely, 2^123178040 is an apocalyptic number.

123178040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123178040 is an abundant number, since it is smaller than the sum of its proper divisors (153972640).

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

123178040 is a wasteful number, since it uses less digits than its factorization.

123178040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3079462 (or 3079458 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 123178040 is about 11098.5602669896. The cubic root of 123178040 is about 497.5588206842.

The spelling of 123178040 in words is "one hundred twenty-three million, one hundred seventy-eight thousand, forty".