123020440 has 32 divisors (see below), whose sum is σ = 291366000. Its totient is φ = 46617984.

The previous prime is 123020423. The next prime is 123020441. The reversal of 123020440 is 44020321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123020441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80175 + ... + 81694.

Almost surely, 2^123020440 is an apocalyptic number.

123020440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123020440 is an abundant number, since it is smaller than the sum of its proper divisors (168345560).

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

123020440 is a wasteful number, since it uses less digits than its factorization.

123020440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161899 (or 161895 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 123020440 is about 11091.4579744955. The cubic root of 123020440 is about 497.3465297686.

Adding to 123020440 its reverse (44020321), we get a palindrome (167040761).

It can be divided in two parts, 1230204 and 40, that multiplied together give a triangular number (49208160 = T₉₉₂₀).

The spelling of 123020440 in words is "one hundred twenty-three million, twenty thousand, four hundred forty".