50686406 has 4 divisors (see below), whose sum is σ = 76029612. Its totient is φ = 25343202.

The previous prime is 50686399. The next prime is 50686409. The reversal of 50686406 is 60468605.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×50686406² = 5138223506393672, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50686409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12671600 + ... + 12671603.

It is an arithmetic number, because the mean of its divisors is an integer number (19007403).

Almost surely, 2^50686406 is an apocalyptic number.

50686406 is the 3806-th centered heptagonal number.

50686406 is a deficient number, since it is larger than the sum of its proper divisors (25343206).

50686406 is a wasteful number, since it uses less digits than its factorization.

50686406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25343205.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 50686406 is about 7119.4386014629. The cubic root of 50686406 is about 370.0813213023.

The spelling of 50686406 in words is "fifty million, six hundred eighty-six thousand, four hundred six".