1240198400 has 432 divisors, whose sum is σ = 3893084160. Its totient is φ = 381542400.

The previous prime is 1240198363. The next prime is 1240198409. The reversal of 1240198400 is 48910421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240198409) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26387177 + ... + 26387223.

Almost surely, 2^1240198400 is an apocalyptic number.

1240198400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1240198400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1946542080).

1240198400 is an abundant number, since it is smaller than the sum of its proper divisors (2652885760).

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

1240198400 is a wasteful number, since it uses less digits than its factorization.

1240198400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 1240198400 is about 35216.4507013413. The cubic root of 1240198400 is about 1074.3943659105.

The spelling of 1240198400 in words is "one billion, two hundred forty million, one hundred ninety-eight thousand, four hundred".