138452190 has 16 divisors (see below), whose sum is σ = 332285328. Its totient is φ = 36920576.

The previous prime is 138452189. The next prime is 138452207. The reversal of 138452190 is 91254831.

It is a super-2 number, since 2×138452190² = 38338017831592200, 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 7 ways as a sum of consecutive naturals, for example, 2307507 + ... + 2307566.

It is an arithmetic number, because the mean of its divisors is an integer number (20767833).

Almost surely, 2^138452190 is an apocalyptic number.

138452190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138452190 is an abundant number, since it is smaller than the sum of its proper divisors (193833138).

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

138452190 is a wasteful number, since it uses less digits than its factorization.

138452190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4615083.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 138452190 is about 11766.5708683541. The cubic root of 138452190 is about 517.3287444718.

The spelling of 138452190 in words is "one hundred thirty-eight million, four hundred fifty-two thousand, one hundred ninety".