140269778 has 16 divisors (see below), whose sum is σ = 239512896. Its totient is φ = 60986640.

The previous prime is 140269777. The next prime is 140269859. The reversal of 140269778 is 877962041.

It is a super-2 number, since 2×140269778² = 39351221240338568, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (140269777) 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, 138101 + ... + 139112.

It is an arithmetic number, because the mean of its divisors is an integer number (14969556).

Almost surely, 2^140269778 is an apocalyptic number.

140269778 is a deficient number, since it is larger than the sum of its proper divisors (99243118).

140269778 is a wasteful number, since it uses less digits than its factorization.

140269778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277249.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 140269778 is about 11843.5542807048. The cubic root of 140269778 is about 519.5827249110.

The spelling of 140269778 in words is "one hundred forty million, two hundred sixty-nine thousand, seven hundred seventy-eight".