139921488 has 120 divisors (see below), whose sum is σ = 451463168. Its totient is φ = 39626496.

The previous prime is 139921487. The next prime is 139921499. The reversal of 139921488 is 884129931.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139921487) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127470 + ... + 128562.

Almost surely, 2^139921488 is an apocalyptic number.

139921488 is a gapful number since it is divisible by the number (18) 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 139921488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225731584).

139921488 is an abundant number, since it is smaller than the sum of its proper divisors (311541680).

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

139921488 is a wasteful number, since it uses less digits than its factorization.

139921488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241 (or 1232 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 139921488 is about 11828.8413633796. The cubic root of 139921488 is about 519.1523270117.

The spelling of 139921488 in words is "one hundred thirty-nine million, nine hundred twenty-one thousand, four hundred eighty-eight".