61409892 has 12 divisors (see below), whose sum is σ = 143289776. Its totient is φ = 20469960.

The previous prime is 61409879. The next prime is 61409917. The reversal of 61409892 is 29890416.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 61409892.

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, 2558734 + ... + 2558757.

Almost surely, 2^61409892 is an apocalyptic number.

It is an amenable number.

61409892 is an abundant number, since it is smaller than the sum of its proper divisors (81879884).

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

61409892 is a wasteful number, since it uses less digits than its factorization.

61409892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5117498 (or 5117496 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 61409892 is about 7836.4463885105. The cubic root of 61409892 is about 394.5294658813.

The spelling of 61409892 in words is "sixty-one million, four hundred nine thousand, eight hundred ninety-two".