140969988 has 36 divisors (see below), whose sum is σ = 357690060. Its totient is φ = 46812096.

The previous prime is 140969981. The next prime is 140969999. The reversal of 140969988 is 889969041.

It can be written as a sum of positive squares in 2 ways, for example, as 15350724 + 125619264 = 3918^2 + 11208^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (140969981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2406 + ... + 16962.

It is an arithmetic number, because the mean of its divisors is an integer number (9935835).

Almost surely, 2^140969988 is an apocalyptic number.

140969988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

140969988 is an abundant number, since it is smaller than the sum of its proper divisors (216720072).

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

140969988 is a wasteful number, since it uses less digits than its factorization.

140969988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14836 (or 14831 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 140969988 is about 11873.0782866113. The cubic root of 140969988 is about 520.4458552808.

The spelling of 140969988 in words is "one hundred forty million, nine hundred sixty-nine thousand, nine hundred eighty-eight".