61440404 has 6 divisors (see below), whose sum is σ = 107520714. Its totient is φ = 30720200.

The previous prime is 61440371. The next prime is 61440439. The reversal of 61440404 is 40404416.

It can be written as a sum of positive squares in only one way, i.e., 53260804 + 8179600 = 7298^2 + 2860^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 61440404.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7680047 + ... + 7680054.

It is an arithmetic number, because the mean of its divisors is an integer number (17920119).

Almost surely, 2^61440404 is an apocalyptic number.

It is an amenable number.

61440404 is a deficient number, since it is larger than the sum of its proper divisors (46080310).

61440404 is a wasteful number, since it uses less digits than its factorization.

61440404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15360105 (or 15360103 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 61440404 is about 7838.3929475371. The cubic root of 61440404 is about 394.5947967779.

The spelling of 61440404 in words is "sixty-one million, four hundred forty thousand, four hundred four".