139418280 has 128 divisors (see below), whose sum is σ = 468115200. Its totient is φ = 36907776.

The previous prime is 139418273. The next prime is 139418329. The reversal of 139418280 is 82814931.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 179974 + ... + 180746.

It is an arithmetic number, because the mean of its divisors is an integer number (3657150).

Almost surely, 2^139418280 is an apocalyptic number.

139418280 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 139418280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234057600).

139418280 is an abundant number, since it is smaller than the sum of its proper divisors (328696920).

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

139418280 is a wasteful number, since it uses less digits than its factorization.

139418280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960 (or 950 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 139418280 is about 11807.5518207628. The cubic root of 139418280 is about 518.5292266143.

The spelling of 139418280 in words is "one hundred thirty-nine million, four hundred eighteen thousand, two hundred eighty".