139994400 has 288 divisors, whose sum is σ = 561714048. Its totient is φ = 29491200.

The previous prime is 139994389. The next prime is 139994401. The reversal of 139994400 is 4499931.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (139994401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 218080 + ... + 218720.

It is an arithmetic number, because the mean of its divisors is an integer number (1950396).

Almost surely, 2^139994400 is an apocalyptic number.

139994400 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 139994400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280857024).

139994400 is an abundant number, since it is smaller than the sum of its proper divisors (421719648).

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

139994400 is a wasteful number, since it uses less digits than its factorization.

139994400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684 (or 671 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 139994400 is about 11831.9229206414. The cubic root of 139994400 is about 519.2424867673.

The spelling of 139994400 in words is "one hundred thirty-nine million, nine hundred ninety-four thousand, four hundred".