198438040 has 16 divisors (see below), whose sum is σ = 446485680. Its totient is φ = 79375200.

The previous prime is 198438029. The next prime is 198438047. The reversal of 198438040 is 40834891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198438047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2480436 + ... + 2480515.

It is an arithmetic number, because the mean of its divisors is an integer number (27905355).

Almost surely, 2^198438040 is an apocalyptic number.

198438040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198438040 is an abundant number, since it is smaller than the sum of its proper divisors (248047640).

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

198438040 is a wasteful number, since it uses less digits than its factorization.

198438040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4960962 (or 4960958 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 198438040 is about 14086.8037538684. The cubic root of 198438040 is about 583.2771675628.

The spelling of 198438040 in words is "one hundred ninety-eight million, four hundred thirty-eight thousand, forty".