139088690 has 24 divisors (see below), whose sum is σ = 271102788. Its totient is φ = 51355200.

The previous prime is 139088689. The next prime is 139088699. The reversal of 139088690 is 96880931.

It can be written as a sum of positive squares in 6 ways, for example, as 22686169 + 116402521 = 4763^2 + 10789^2 .

It is a super-2 number, since 2×139088690² = 38691327371832200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139088699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39461 + ... + 42840.

Almost surely, 2^139088690 is an apocalyptic number.

139088690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139088690 is a deficient number, since it is larger than the sum of its proper divisors (132014098).

139088690 is a wasteful number, since it uses less digits than its factorization.

139088690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82334 (or 82321 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 139088690 is about 11793.5868165711. The cubic root of 139088690 is about 518.1202967431.

The spelling of 139088690 in words is "one hundred thirty-nine million, eighty-eight thousand, six hundred ninety".