122747440 has 40 divisors (see below), whose sum is σ = 292356288. Its totient is φ = 47900160.

The previous prime is 122747437. The next prime is 122747441. The reversal of 122747440 is 44747221.

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

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (122747441) by changing a digit.

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, 15432 + ... + 21991.

Almost surely, 2^122747440 is an apocalyptic number.

122747440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122747440 is an abundant number, since it is smaller than the sum of its proper divisors (169608848).

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

122747440 is a wasteful number, since it uses less digits than its factorization.

122747440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37477 (or 37471 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 31.

The square root of 122747440 is about 11079.1443712951. The cubic root of 122747440 is about 496.9783628693.

The spelling of 122747440 in words is "one hundred twenty-two million, seven hundred forty-seven thousand, four hundred forty".