61440588 has 36 divisors (see below), whose sum is σ = 169428168. Its totient is φ = 18618240.

The previous prime is 61440583. The next prime is 61440629. The reversal of 61440588 is 88504416.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (61440581) 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 11 ways as a sum of consecutive naturals, for example, 77181 + ... + 77972.

It is an arithmetic number, because the mean of its divisors is an integer number (4706338).

Almost surely, 2^61440588 is an apocalyptic number.

It is an amenable number.

61440588 is an abundant number, since it is smaller than the sum of its proper divisors (107987580).

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

61440588 is a wasteful number, since it uses less digits than its factorization.

61440588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155174 (or 155169 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 61440588 is about 7838.4046846281. The cubic root of 61440588 is about 394.5951906846.

The spelling of 61440588 in words is "sixty-one million, four hundred forty thousand, five hundred eighty-eight".