139451340 has 96 divisors (see below), whose sum is σ = 472518144. Its totient is φ = 29998080.

The previous prime is 139451339. The next prime is 139451383. The reversal of 139451340 is 43154931.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 139451298 and 139451307.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2626 + ... + 16905.

It is an arithmetic number, because the mean of its divisors is an integer number (4922064).

Almost surely, 2^139451340 is an apocalyptic number.

139451340 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 139451340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236259072).

139451340 is an abundant number, since it is smaller than the sum of its proper divisors (333066804).

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

139451340 is a wasteful number, since it uses less digits than its factorization.

139451340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19567 (or 19565 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 139451340 is about 11808.9516892906. The cubic root of 139451340 is about 518.5702093353.

The spelling of 139451340 in words is "one hundred thirty-nine million, four hundred fifty-one thousand, three hundred forty".