123550040 has 32 divisors (see below), whose sum is σ = 278361360. Its totient is φ = 49353600.

The previous prime is 123550039. The next prime is 123550073. The reversal of 123550040 is 40055321.

It is a super-2 number, since 2×123550040² = 30529224768003200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 123549994 and 123550021.

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, 37250 + ... + 40430.

Almost surely, 2^123550040 is an apocalyptic number.

123550040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123550040 is an abundant number, since it is smaller than the sum of its proper divisors (154811320).

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

123550040 is a wasteful number, since it uses less digits than its factorization.

123550040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4163 (or 4159 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 123550040 is about 11115.3065634736. The cubic root of 123550040 is about 498.0591963094.

The spelling of 123550040 in words is "one hundred twenty-three million, five hundred fifty thousand, forty".