139637248 has 40 divisors (see below), whose sum is σ = 280482048. Its totient is φ = 69448704.

The previous prime is 139637243. The next prime is 139637249. The reversal of 139637248 is 842736931.

It is a super-2 number, since 2×139637248² = 38997122058027008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139637243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113565 + ... + 114787.

Almost surely, 2^139637248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139637248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140241024).

139637248 is an abundant number, since it is smaller than the sum of its proper divisors (140844800).

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

139637248 is an equidigital number, since it uses as much as digits as its factorization.

139637248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464 (or 1448 counting only the distinct ones).

The product of its digits is 217728, while the sum is 43.

The square root of 139637248 is about 11816.8205537700. The cubic root of 139637248 is about 518.8005490394.

The spelling of 139637248 in words is "one hundred thirty-nine million, six hundred thirty-seven thousand, two hundred forty-eight".