140531978 has 8 divisors (see below), whose sum is σ = 219963168. Its totient is φ = 67210924.

The previous prime is 140531971. The next prime is 140531987. The reversal of 140531978 is 879135041.

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

It is not an unprimeable number, because it can be changed into a prime (140531971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1527476 + ... + 1527567.

It is an arithmetic number, because the mean of its divisors is an integer number (27495396).

Almost surely, 2^140531978 is an apocalyptic number.

140531978 is a deficient number, since it is larger than the sum of its proper divisors (79431190).

140531978 is a wasteful number, since it uses less digits than its factorization.

140531978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3055068.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 140531978 is about 11854.6184249009. The cubic root of 140531978 is about 519.9062676221.

The spelling of 140531978 in words is "one hundred forty million, five hundred thirty-one thousand, nine hundred seventy-eight".