140782730 has 16 divisors (see below), whose sum is σ = 276446304. Its totient is φ = 51193680.

The previous prime is 140782727. The next prime is 140782739. The reversal of 140782730 is 37287041.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (140782739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 639812 + ... + 640031.

It is an arithmetic number, because the mean of its divisors is an integer number (17277894).

Almost surely, 2^140782730 is an apocalyptic number.

140782730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

140782730 is a deficient number, since it is larger than the sum of its proper divisors (135663574).

140782730 is a wasteful number, since it uses less digits than its factorization.

140782730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279861.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 140782730 is about 11865.1898425605. The cubic root of 140782730 is about 520.2153077816.

The spelling of 140782730 in words is "one hundred forty million, seven hundred eighty-two thousand, seven hundred thirty".