139321740 has 48 divisors (see below), whose sum is σ = 390710880. Its totient is φ = 37094400.

The previous prime is 139321727. The next prime is 139321747. The reversal of 139321740 is 47123931.

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

It is a zygodrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 139321698 and 139321707.

It is not an unprimeable number, because it can be changed into a prime (139321747) 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, 48340 + ... + 51140.

It is an arithmetic number, because the mean of its divisors is an integer number (8139810).

Almost surely, 2^139321740 is an apocalyptic number.

139321740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139321740 is an abundant number, since it is smaller than the sum of its proper divisors (251389140).

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

139321740 is a wasteful number, since it uses less digits than its factorization.

139321740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3642 (or 3640 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 139321740 is about 11803.4630511558. The cubic root of 139321740 is about 518.4095140239.

The spelling of 139321740 in words is "one hundred thirty-nine million, three hundred twenty-one thousand, seven hundred forty".