138434510 has 8 divisors (see below), whose sum is σ = 249182136. Its totient is φ = 55373800.

The previous prime is 138434509. The next prime is 138434533. The reversal of 138434510 is 15434831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×138434510² = 38328227117880200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6921716 + ... + 6921735.

It is an arithmetic number, because the mean of its divisors is an integer number (31147767).

Almost surely, 2^138434510 is an apocalyptic number.

138434510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138434510 is a deficient number, since it is larger than the sum of its proper divisors (110747626).

138434510 is a wasteful number, since it uses less digits than its factorization.

138434510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13843458.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 138434510 is about 11765.8195634643. The cubic root of 138434510 is about 517.3067230035.

The spelling of 138434510 in words is "one hundred thirty-eight million, four hundred thirty-four thousand, five hundred ten".