139488840 has 192 divisors, whose sum is σ = 485222400. Its totient is φ = 34675200.

The previous prime is 139488821. The next prime is 139488901. The reversal of 139488840 is 48884931.

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

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, 323425 + ... + 323855.

It is an arithmetic number, because the mean of its divisors is an integer number (2527200).

Almost surely, 2^139488840 is an apocalyptic number.

139488840 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 139488840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242611200).

139488840 is an abundant number, since it is smaller than the sum of its proper divisors (345733560).

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

139488840 is a wasteful number, since it uses less digits than its factorization.

139488840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 501 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 139488840 is about 11810.5393610961. The cubic root of 139488840 is about 518.6166882481.

The spelling of 139488840 in words is "one hundred thirty-nine million, four hundred eighty-eight thousand, eight hundred forty".