139662468 has 120 divisors (see below), whose sum is σ = 402494400. Its totient is φ = 41878080.

The previous prime is 139662461. The next prime is 139662491. The reversal of 139662468 is 864266931.

139662468 is a `hidden beast` number, since 13 + 9 + 6 + 624 + 6 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (139662461) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 530905 + ... + 531167.

It is an arithmetic number, because the mean of its divisors is an integer number (3354120).

Almost surely, 2^139662468 is an apocalyptic number.

139662468 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 139662468, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201247200).

139662468 is an abundant number, since it is smaller than the sum of its proper divisors (262831932).

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

139662468 is a wasteful number, since it uses less digits than its factorization.

139662468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439 (or 428 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 139662468 is about 11817.8876285062. The cubic root of 139662468 is about 518.8317808260.

The spelling of 139662468 in words is "one hundred thirty-nine million, six hundred sixty-two thousand, four hundred sixty-eight".