61440432 has 40 divisors (see below), whose sum is σ = 159317184. Its totient is φ = 20403264.

The previous prime is 61440371. The next prime is 61440439. The reversal of 61440432 is 23404416.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (61440439) 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 7 ways as a sum of consecutive naturals, for example, 11323 + ... + 15845.

Almost surely, 2^61440432 is an apocalyptic number.

It is an amenable number.

61440432 is an abundant number, since it is smaller than the sum of its proper divisors (97876752).

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

61440432 is a wasteful number, since it uses less digits than its factorization.

61440432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4817 (or 4811 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 61440432 is about 7838.3947336173. The cubic root of 61440432 is about 394.5948567202.

Adding to 61440432 its reverse (23404416), we get a palindrome (84844848).

The spelling of 61440432 in words is "sixty-one million, four hundred forty thousand, four hundred thirty-two".