126993644 has 24 divisors (see below), whose sum is σ = 236221440. Its totient is φ = 59567184.

The previous prime is 126993631. The next prime is 126993667. The reversal of 126993644 is 446399621.

It is a happy number.

It is a super-2 number, since 2×126993644² = 32254771232797472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 126993595 and 126993604.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284 + ... + 15939.

It is an arithmetic number, because the mean of its divisors is an integer number (9842560).

Almost surely, 2^126993644 is an apocalyptic number.

It is an amenable number.

126993644 is a deficient number, since it is larger than the sum of its proper divisors (109227796).

126993644 is a wasteful number, since it uses less digits than its factorization.

126993644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16349 (or 16347 counting only the distinct ones).

The product of its digits is 279936, while the sum is 44.

The square root of 126993644 is about 11269.1456641575. The cubic root of 126993644 is about 502.6441839328.

It can be divided in two parts, 1269 and 93644, that multiplied together give a triangular number (118834236 = T₁₅₄₁₆).

The spelling of 126993644 in words is "one hundred twenty-six million, nine hundred ninety-three thousand, six hundred forty-four".