126989632 has 112 divisors (see below), whose sum is σ = 319381632. Its totient is φ = 48660480.

The previous prime is 126989593. The next prime is 126989651. The reversal of 126989632 is 236989621.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×126989632² = 32252733270990848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 359568 + ... + 359920.

Almost surely, 2^126989632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126989632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159690816).

126989632 is an abundant number, since it is smaller than the sum of its proper divisors (192392000).

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

126989632 is a wasteful number, since it uses less digits than its factorization.

126989632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456 (or 446 counting only the distinct ones).

The product of its digits is 279936, while the sum is 46.

The square root of 126989632 is about 11268.9676545813. The cubic root of 126989632 is about 502.6388906766.

The spelling of 126989632 in words is "one hundred twenty-six million, nine hundred eighty-nine thousand, six hundred thirty-two".