139690008 has 96 divisors (see below), whose sum is σ = 395500560. Its totient is φ = 46189440.

The previous prime is 139689983. The next prime is 139690021. The reversal of 139690008 is 800096931.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 351666 + ... + 352062.

Almost surely, 2^139690008 is an apocalyptic number.

139690008 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 139690008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197750280).

139690008 is an abundant number, since it is smaller than the sum of its proper divisors (255810552).

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

139690008 is a wasteful number, since it uses less digits than its factorization.

139690008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599 (or 583 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 139690008 is about 11819.0527539224. The cubic root of 139690008 is about 518.8658813456.

The spelling of 139690008 in words is "one hundred thirty-nine million, six hundred ninety thousand, eight".