139298400 has 144 divisors (see below), whose sum is σ = 503874000. Its totient is φ = 37140480.

The previous prime is 139298399. The next prime is 139298413. The reversal of 139298400 is 4892931.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 7.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18376 + ... + 24824.

It is an arithmetic number, because the mean of its divisors is an integer number (3499125).

Almost surely, 2^139298400 is an apocalyptic number.

139298400 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 139298400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251937000).

139298400 is an abundant number, since it is smaller than the sum of its proper divisors (364575600).

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

139298400 is a wasteful number, since it uses less digits than its factorization.

139298400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6478 (or 6459 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 139298400 is about 11802.4743168541. The cubic root of 139298400 is about 518.3805634002.

The spelling of 139298400 in words is "one hundred thirty-nine million, two hundred ninety-eight thousand, four hundred".