122746640 has 40 divisors (see below), whose sum is σ = 290075928. Its totient is φ = 48291840.

The previous prime is 122746633. The next prime is 122746667. The reversal of 122746640 is 46647221.

It can be written as a sum of positive squares in 4 ways, for example, as 246016 + 122500624 = 496^2 + 11068^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 122746597 and 122746606.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7697 + ... + 17456.

Almost surely, 2^122746640 is an apocalyptic number.

122746640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122746640 is an abundant number, since it is smaller than the sum of its proper divisors (167329288).

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

122746640 is a wasteful number, since it uses less digits than its factorization.

122746640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25227 (or 25221 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 122746640 is about 11079.1082673652. The cubic root of 122746640 is about 496.9772831902.

The spelling of 122746640 in words is "one hundred twenty-two million, seven hundred forty-six thousand, six hundred forty".