123720478 has 16 divisors (see below), whose sum is σ = 214778880. Its totient is φ = 52351416.

The previous prime is 123720469. The next prime is 123720481. The reversal of 123720478 is 874027321.

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, 54826 + ... + 57037.

It is an arithmetic number, because the mean of its divisors is an integer number (13423680).

Almost surely, 2^123720478 is an apocalyptic number.

123720478 is a deficient number, since it is larger than the sum of its proper divisors (91058402).

123720478 is a wasteful number, since it uses less digits than its factorization.

123720478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111951.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 123720478 is about 11122.9707362737. The cubic root of 123720478 is about 498.2881162638.

Adding to 123720478 its reverse (874027321), we get a palindrome (997747799).

The spelling of 123720478 in words is "one hundred twenty-three million, seven hundred twenty thousand, four hundred seventy-eight".