138403850 has 48 divisors (see below), whose sum is σ = 281232000. Its totient is φ = 50366400.

The previous prime is 138403841. The next prime is 138403873. The reversal of 138403850 is 58304831.

138403850 = T₃₃₁₅ + T₃₃₁₆ + ... + T₃₃₃₉.

It is a happy number.

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, 44651 + ... + 47649.

It is an arithmetic number, because the mean of its divisors is an integer number (5859000).

Almost surely, 2^138403850 is an apocalyptic number.

138403850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138403850 is an abundant number, since it is smaller than the sum of its proper divisors (142828150).

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

138403850 is a wasteful number, since it uses less digits than its factorization.

138403850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3095 (or 3090 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 138403850 is about 11764.5165646532. The cubic root of 138403850 is about 517.2685297447.

The spelling of 138403850 in words is "one hundred thirty-eight million, four hundred three thousand, eight hundred fifty".