139842864 has 90 divisors (see below), whose sum is σ = 455285220. Its totient is φ = 39953088.

The previous prime is 139842847. The next prime is 139842889. The reversal of 139842864 is 468248931.

It is a happy number.

It is a super-2 number, since 2×139842864² = 39112053223444992, which contains 22 as substring.

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

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, 2854 + ... + 16965.

Almost surely, 2^139842864 is an apocalyptic number.

139842864 is a gapful number since it is divisible by the number (14) 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 139842864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227642610).

139842864 is an abundant number, since it is smaller than the sum of its proper divisors (315442356).

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

139842864 is a wasteful number, since it uses less digits than its factorization.

139842864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19847 (or 19831 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 139842864 is about 11825.5174939619. The cubic root of 139842864 is about 519.0550689448.

The spelling of 139842864 in words is "one hundred thirty-nine million, eight hundred forty-two thousand, eight hundred sixty-four".