199401240 has 32 divisors (see below), whose sum is σ = 598204080. Its totient is φ = 53173632.

The previous prime is 199401227. The next prime is 199401247. The reversal of 199401240 is 42104991.

199401240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 199401198 and 199401207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199401247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 830719 + ... + 830958.

Almost surely, 2^199401240 is an apocalyptic number.

199401240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199401240 is an abundant number, since it is smaller than the sum of its proper divisors (398802840).

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

199401240 is a wasteful number, since it uses less digits than its factorization.

199401240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1661691 (or 1661687 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 199401240 is about 14120.9503929445. The cubic root of 199401240 is about 584.2193693295.

The spelling of 199401240 in words is "one hundred ninety-nine million, four hundred one thousand, two hundred forty".