61405286 has 8 divisors (see below), whose sum is σ = 92503944. Its totient is φ = 30570640.

The previous prime is 61405277. The next prime is 61405301. The reversal of 61405286 is 68250416.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65420 + ... + 66351.

It is an arithmetic number, because the mean of its divisors is an integer number (11562993).

Almost surely, 2^61405286 is an apocalyptic number.

61405286 is a deficient number, since it is larger than the sum of its proper divisors (31098658).

61405286 is a wasteful number, since it uses less digits than its factorization.

61405286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132006.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 61405286 is about 7836.1524997922. The cubic root of 61405286 is about 394.5196018453.

The spelling of 61405286 in words is "sixty-one million, four hundred five thousand, two hundred eighty-six".