140065978 has 8 divisors (see below), whose sum is σ = 226260468. Its totient is φ = 64645824.

The previous prime is 140065957. The next prime is 140065997. The reversal of 140065978 is 879560041.

140065978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 138368169 + 1697809 = 11763^2 + 1303^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 140065978.

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, 2693551 + ... + 2693602.

Almost surely, 2^140065978 is an apocalyptic number.

140065978 is a deficient number, since it is larger than the sum of its proper divisors (86194490).

140065978 is a wasteful number, since it uses less digits than its factorization.

140065978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5387168.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 140065978 is about 11834.9473171620. The cubic root of 140065978 is about 519.3309665118.

The spelling of 140065978 in words is "one hundred forty million, sixty-five thousand, nine hundred seventy-eight".