139996800 has 144 divisors (see below), whose sum is σ = 499643430. Its totient is φ = 37324800.

The previous prime is 139996783. The next prime is 139996811. The reversal of 139996800 is 8699931.

It can be written as a sum of positive squares in 3 ways, for example, as 128867904 + 11128896 = 11352^2 + 3336^2 .

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 (45).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 26370 + ... + 31230.

Almost surely, 2^139996800 is an apocalyptic number.

139996800 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 139996800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249821715).

139996800 is an abundant number, since it is smaller than the sum of its proper divisors (359646630).

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

139996800 is a wasteful number, since it uses less digits than its factorization.

139996800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4891 (or 4871 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 139996800 is about 11832.0243407458. The cubic root of 139996800 is about 519.2454539690.

The spelling of 139996800 in words is "one hundred thirty-nine million, nine hundred ninety-six thousand, eight hundred".