139433850 has 36 divisors (see below), whose sum is σ = 374613486. Its totient is φ = 37182240.

The previous prime is 139433849. The next prime is 139433851. The reversal of 139433850 is 58334931.

It is an interprime number because it is at equal distance from previous prime (139433849) and next prime (139433851).

It can be written as a sum of positive squares in 3 ways, for example, as 60419529 + 79014321 = 7773^2 + 8889^2 .

It is not an unprimeable number, because it can be changed into a prime (139433851) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 154477 + ... + 155376.

Almost surely, 2^139433850 is an apocalyptic number.

139433850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139433850 is an abundant number, since it is smaller than the sum of its proper divisors (235179636).

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

139433850 is a wasteful number, since it uses less digits than its factorization.

139433850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309871 (or 309863 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 139433850 is about 11808.2111261613. The cubic root of 139433850 is about 518.5485287210.

The spelling of 139433850 in words is "one hundred thirty-nine million, four hundred thirty-three thousand, eight hundred fifty".