140401986 has 8 divisors (see below), whose sum is σ = 280803984. Its totient is φ = 46800660.

The previous prime is 140401979. The next prime is 140401993. The reversal of 140401986 is 689104041.

It is an interprime number because it is at equal distance from previous prime (140401979) and next prime (140401993).

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

140401986 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11700160 + ... + 11700171.

It is an arithmetic number, because the mean of its divisors is an integer number (35100498).

Almost surely, 2^140401986 is an apocalyptic number.

140401986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

140401986 is a wasteful number, since it uses less digits than its factorization.

140401986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23400336.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 140401986 is about 11849.1343987652. The cubic root of 140401986 is about 519.7459138352.

The spelling of 140401986 in words is "one hundred forty million, four hundred one thousand, nine hundred eighty-six".