122987440 has 40 divisors (see below), whose sum is σ = 298382688. Its totient is φ = 47055360.

The previous prime is 122987429. The next prime is 122987453. The reversal of 122987440 is 44789221.

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 (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 122987440.

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, 31581 + ... + 35260.

Almost surely, 2^122987440 is an apocalyptic number.

122987440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122987440 is an abundant number, since it is smaller than the sum of its proper divisors (175395248).

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

122987440 is a wasteful number, since it uses less digits than its factorization.

122987440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66877 (or 66871 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 122987440 is about 11089.9702434227. The cubic root of 122987440 is about 497.3020550367.

The spelling of 122987440 in words is "one hundred twenty-two million, nine hundred eighty-seven thousand, four hundred forty".