126155440 has 40 divisors (see below), whose sum is σ = 308752560. Its totient is φ = 47805696.

The previous prime is 126155431. The next prime is 126155443. The reversal of 126155440 is 44551621.

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 = 126155399 and 126155408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126155443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39979 + ... + 43018.

It is an arithmetic number, because the mean of its divisors is an integer number (7718814).

Almost surely, 2^126155440 is an apocalyptic number.

126155440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126155440 is an abundant number, since it is smaller than the sum of its proper divisors (182597120).

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

126155440 is a wasteful number, since it uses less digits than its factorization.

126155440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83029 (or 83023 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 126155440 is about 11231.8938741425. The cubic root of 126155440 is about 501.5358640792.

The spelling of 126155440 in words is "one hundred twenty-six million, one hundred fifty-five thousand, four hundred forty".