398199540 has 48 divisors (see below), whose sum is σ = 1116093888. Its totient is φ = 106078464.

The previous prime is 398199509. The next prime is 398199553. The reversal of 398199540 is 45991893.

It is a self number, because there is not a number n which added to its sum of digits gives 398199540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68799 + ... + 74361.

It is an arithmetic number, because the mean of its divisors is an integer number (23251956).

Almost surely, 2^398199540 is an apocalyptic number.

398199540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

398199540 is an abundant number, since it is smaller than the sum of its proper divisors (717894348).

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

398199540 is a wasteful number, since it uses less digits than its factorization.

398199540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6768 (or 6766 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 398199540 is about 19954.9377348064. The cubic root of 398199540 is about 735.6991450143.

The spelling of 398199540 in words is "three hundred ninety-eight million, one hundred ninety-nine thousand, five hundred forty".