139705020 has 192 divisors, whose sum is σ = 535127040. Its totient is φ = 29465856.

The previous prime is 139705001. The next prime is 139705039. The reversal of 139705020 is 20507931.

It is an interprime number because it is at equal distance from previous prime (139705001) and next prime (139705039).

It is a super-2 number, since 2×139705020² = 39034985226400800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 47719 + ... + 50561.

It is an arithmetic number, because the mean of its divisors is an integer number (2787120).

Almost surely, 2^139705020 is an apocalyptic number.

139705020 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 139705020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267563520).

139705020 is an abundant number, since it is smaller than the sum of its proper divisors (395422020).

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

139705020 is a wasteful number, since it uses less digits than its factorization.

139705020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2881 (or 2873 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 139705020 is about 11819.6878131362. The cubic root of 139705020 is about 518.8844675845.

The spelling of 139705020 in words is "one hundred thirty-nine million, seven hundred five thousand, twenty".