139868280 has 192 divisors, whose sum is σ = 478033920. Its totient is φ = 35424000.

The previous prime is 139868263. The next prime is 139868327. The reversal of 139868280 is 82868931.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 926205 + ... + 926355.

It is an arithmetic number, because the mean of its divisors is an integer number (2489760).

Almost surely, 2^139868280 is an apocalyptic number.

139868280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139868280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239016960).

139868280 is an abundant number, since it is smaller than the sum of its proper divisors (338165640).

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

139868280 is a wasteful number, since it uses less digits than its factorization.

139868280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 139868280 is about 11826.5920704149. The cubic root of 139868280 is about 519.0865125811.

The spelling of 139868280 in words is "one hundred thirty-nine million, eight hundred sixty-eight thousand, two hundred eighty".