61280404 has 12 divisors (see below), whose sum is σ = 109856628. Its totient is φ = 29892800.

The previous prime is 61280353. The next prime is 61280413. The reversal of 61280404 is 40408216.

It can be written as a sum of positive squares in 2 ways, for example, as 18404100 + 42876304 = 4290^2 + 6548^2 .

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 in 3 ways as a sum of consecutive naturals, for example, 186667 + ... + 186994.

It is an arithmetic number, because the mean of its divisors is an integer number (9154719).

Almost surely, 2^61280404 is an apocalyptic number.

It is an amenable number.

61280404 is a deficient number, since it is larger than the sum of its proper divisors (48576224).

61280404 is a wasteful number, since it uses less digits than its factorization.

61280404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373706 (or 373704 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 61280404 is about 7828.1801205644. The cubic root of 61280404 is about 394.2519710624.

The spelling of 61280404 in words is "sixty-one million, two hundred eighty thousand, four hundred four".