139375998 has 64 divisors (see below), whose sum is σ = 325140480. Its totient is φ = 44171424.

The previous prime is 139375997. The next prime is 139376051. The reversal of 139375998 is 899573931.

139375998 is a `hidden beast` number, since 13 + 9 + 37 + 599 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139375997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 363715 + ... + 364097.

It is an arithmetic number, because the mean of its divisors is an integer number (5080320).

Almost surely, 2^139375998 is an apocalyptic number.

139375998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 139375998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162570240).

139375998 is an abundant number, since it is smaller than the sum of its proper divisors (185764482).

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

139375998 is a wasteful number, since it uses less digits than its factorization.

139375998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710 (or 704 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The square root of 139375998 is about 11805.7612206922. The cubic root of 139375998 is about 518.4768024284.

The spelling of 139375998 in words is "one hundred thirty-nine million, three hundred seventy-five thousand, nine hundred ninety-eight".