61049440 has 24 divisors (see below), whose sum is σ = 144229680. Its totient is φ = 24419712.

The previous prime is 61049423. The next prime is 61049441. The reversal of 61049440 is 4494016.

It is a junction number, because it is equal to n+sod(n) for n = 61049399 and 61049408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61049441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190620 + ... + 190939.

It is an arithmetic number, because the mean of its divisors is an integer number (6009570).

Almost surely, 2^61049440 is an apocalyptic number.

It is an amenable number.

61049440 is an abundant number, since it is smaller than the sum of its proper divisors (83180240).

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

61049440 is a wasteful number, since it uses less digits than its factorization.

61049440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381574 (or 381566 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 61049440 is about 7813.4141065222. The cubic root of 61049440 is about 393.7560395479.

The spelling of 61049440 in words is "sixty-one million, forty-nine thousand, four hundred forty".