6634840 has 32 divisors (see below), whose sum is σ = 15335280. Its totient is φ = 2581632.

The previous prime is 6634829. The next prime is 6634841. The reversal of 6634840 is 484366.

It is a super-2 number, since 2×6634840² = 88042203651200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6634841) 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, 762 + ... + 3721.

Almost surely, 2^6634840 is an apocalyptic number.

It is an amenable number.

6634840 is an abundant number, since it is smaller than the sum of its proper divisors (8700440).

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

6634840 is a wasteful number, since it uses less digits than its factorization.

6634840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4531 (or 4527 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 6634840 is about 2575.8183165744. The cubic root of 6634840 is about 187.9072275030.

It can be divided in two parts, 66 and 34840, that multiplied together give a triangular number (2299440 = T₂₁₄₄).

The spelling of 6634840 in words is "six million, six hundred thirty-four thousand, eight hundred forty".