126789440 has 28 divisors (see below), whose sum is σ = 301918116. Its totient is φ = 50715648.

The previous prime is 126789433. The next prime is 126789461. The reversal of 126789440 is 44987621.

It can be written as a sum of positive squares in 2 ways, for example, as 97456384 + 29333056 = 9872^2 + 5416^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 197789 + ... + 198428.

Almost surely, 2^126789440 is an apocalyptic number.

126789440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126789440 is an abundant number, since it is smaller than the sum of its proper divisors (175128676).

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

126789440 is an equidigital number, since it uses as much as digits as its factorization.

126789440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396234 (or 396224 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 126789440 is about 11260.0817048545. The cubic root of 126789440 is about 502.3746244638.

The spelling of 126789440 in words is "one hundred twenty-six million, seven hundred eighty-nine thousand, four hundred forty".