139712040 has 320 divisors, whose sum is σ = 526901760. Its totient is φ = 32970240.

The previous prime is 139712003. The next prime is 139712047. The reversal of 139712040 is 40217931.

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

It is a junction number, because it is equal to n+sod(n) for n = 139711995 and 139712013.

It is not an unprimeable number, because it can be changed into a prime (139712047) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1305667 + ... + 1305773.

It is an arithmetic number, because the mean of its divisors is an integer number (1646568).

Almost surely, 2^139712040 is an apocalyptic number.

139712040 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 139712040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263450880).

139712040 is an abundant number, since it is smaller than the sum of its proper divisors (387189720).

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

139712040 is a wasteful number, since it uses less digits than its factorization.

139712040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 139712040 is about 11819.9847715638. The cubic root of 139712040 is about 518.8931585343.

Adding to 139712040 its reverse (40217931), we get a palindrome (179929971).

The spelling of 139712040 in words is "one hundred thirty-nine million, seven hundred twelve thousand, forty".