40449648 has 20 divisors (see below), whose sum is σ = 104495048. Its totient is φ = 13483200.

The previous prime is 40449631. The next prime is 40449667. The reversal of 40449648 is 84694404.

40449648 is nontrivially palindromic in base 7.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421303 + ... + 421398.

Almost surely, 2^40449648 is an apocalyptic number.

40449648 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

40449648 is an abundant number, since it is smaller than the sum of its proper divisors (64045400).

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

40449648 is a wasteful number, since it uses less digits than its factorization.

40449648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842712 (or 842706 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 40449648 is about 6360.0037735838. The cubic root of 40449648 is about 343.2718960879.

The spelling of 40449648 in words is "forty million, four hundred forty-nine thousand, six hundred forty-eight".