123906740 has 12 divisors (see below), whose sum is σ = 260204196. Its totient is φ = 49562688.

The previous prime is 123906709. The next prime is 123906767. The reversal of 123906740 is 47609321.

It can be written as a sum of positive squares in 2 ways, for example, as 62378404 + 61528336 = 7898^2 + 7844^2 .

It is a junction number, because it is equal to n+sod(n) for n = 123906697 and 123906706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3097649 + ... + 3097688.

It is an arithmetic number, because the mean of its divisors is an integer number (21683683).

Almost surely, 2^123906740 is an apocalyptic number.

123906740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123906740 is an abundant number, since it is smaller than the sum of its proper divisors (136297456).

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

123906740 is a wasteful number, since it uses less digits than its factorization.

123906740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6195346 (or 6195344 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 123906740 is about 11131.3404403962. The cubic root of 123906740 is about 498.5380495680.

The spelling of 123906740 in words is "one hundred twenty-three million, nine hundred six thousand, seven hundred forty".