139071400 has 96 divisors (see below), whose sum is σ = 352711800. Its totient is φ = 50688000.

The previous prime is 139071391. The next prime is 139071461. The reversal of 139071400 is 4170931.

It can be written as a sum of positive squares in 12 ways, for example, as 820836 + 138250564 = 906^2 + 11758^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 231100 + ... + 231700.

Almost surely, 2^139071400 is an apocalyptic number.

139071400 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 139071400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176355900).

139071400 is an abundant number, since it is smaller than the sum of its proper divisors (213640400).

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

139071400 is a wasteful number, since it uses less digits than its factorization.

139071400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719 (or 710 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 139071400 is about 11792.8537682785. The cubic root of 139071400 is about 518.0988268182.

The spelling of 139071400 in words is "one hundred thirty-nine million, seventy-one thousand, four hundred".