139465280 has 112 divisors (see below), whose sum is σ = 363419136. Its totient is φ = 50749440.

The previous prime is 139465253. The next prime is 139465283. The reversal of 139465280 is 82564931.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (139465283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168227 + ... + 169053.

Almost surely, 2^139465280 is an apocalyptic number.

139465280 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 139465280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181709568).

139465280 is an abundant number, since it is smaller than the sum of its proper divisors (223953856).

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

139465280 is a wasteful number, since it uses less digits than its factorization.

139465280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892 (or 882 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 139465280 is about 11809.5419047480. The cubic root of 139465280 is about 518.5874880694.

The spelling of 139465280 in words is "one hundred thirty-nine million, four hundred sixty-five thousand, two hundred eighty".