139899140 has 24 divisors (see below), whose sum is σ = 296701272. Its totient is φ = 55404800.

The previous prime is 139899139. The next prime is 139899163. The reversal of 139899140 is 41998931.

It can be written as a sum of positive squares in 4 ways, for example, as 68293696 + 71605444 = 8264^2 + 8462^2 .

It is a junction number, because it is equal to n+sod(n) for n = 139899091 and 139899100.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32609 + ... + 36648.

It is an arithmetic number, because the mean of its divisors is an integer number (12362553).

Almost surely, 2^139899140 is an apocalyptic number.

139899140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139899140 is an abundant number, since it is smaller than the sum of its proper divisors (156802132).

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

139899140 is a wasteful number, since it uses less digits than its factorization.

139899140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69367 (or 69365 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 139899140 is about 11827.8966853790. The cubic root of 139899140 is about 519.1246861918.

The spelling of 139899140 in words is "one hundred thirty-nine million, eight hundred ninety-nine thousand, one hundred forty".