139587420 has 192 divisors, whose sum is σ = 470679552. Its totient is φ = 30240000.

The previous prime is 139587419. The next prime is 139587439. The reversal of 139587420 is 24785931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 924345 + ... + 924495.

It is an arithmetic number, because the mean of its divisors is an integer number (2451456).

Almost surely, 2^139587420 is an apocalyptic number.

139587420 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 139587420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235339776).

139587420 is an abundant number, since it is smaller than the sum of its proper divisors (331092132).

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

139587420 is a wasteful number, since it uses less digits than its factorization.

139587420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 139587420 is about 11814.7120151107. The cubic root of 139587420 is about 518.7388322945.

The spelling of 139587420 in words is "one hundred thirty-nine million, five hundred eighty-seven thousand, four hundred twenty".