123537940 has 24 divisors (see below), whose sum is σ = 260582112. Its totient is φ = 49195680.

The previous prime is 123537923. The next prime is 123537959. The reversal of 123537940 is 49735321.

It is a junction number, because it is equal to n+sod(n) for n = 123537896 and 123537905.

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, 9066 + ... + 18145.

It is an arithmetic number, because the mean of its divisors is an integer number (10857588).

Almost surely, 2^123537940 is an apocalyptic number.

123537940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123537940 is an abundant number, since it is smaller than the sum of its proper divisors (137044172).

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

123537940 is a wasteful number, since it uses less digits than its factorization.

123537940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27447 (or 27445 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 123537940 is about 11114.7622556670. The cubic root of 123537940 is about 498.0429364656.

The spelling of 123537940 in words is "one hundred twenty-three million, five hundred thirty-seven thousand, nine hundred forty".