123807720 has 32 divisors (see below), whose sum is σ = 371423520. Its totient is φ = 33015360.

The previous prime is 123807703. The next prime is 123807799. The reversal of 123807720 is 27708321.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 515746 + ... + 515985.

It is an arithmetic number, because the mean of its divisors is an integer number (11606985).

Almost surely, 2^123807720 is an apocalyptic number.

123807720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123807720 is an abundant number, since it is smaller than the sum of its proper divisors (247615800).

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

123807720 is a wasteful number, since it uses less digits than its factorization.

123807720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031745 (or 1031741 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 123807720 is about 11126.8917492712. The cubic root of 123807720 is about 498.4052120442.

It can be divided in two parts, 12380 and 7720, that added together give a triangular number (20100 = T₂₀₀).

The spelling of 123807720 in words is "one hundred twenty-three million, eight hundred seven thousand, seven hundred twenty".