1205049400 has 24 divisors (see below), whose sum is σ = 2801740320. Its totient is φ = 482019680.

The previous prime is 1205049389. The next prime is 1205049401. The reversal of 1205049400 is 49405021.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205049401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3012424 + ... + 3012823.

It is an arithmetic number, because the mean of its divisors is an integer number (116739180).

Almost surely, 2^1205049400 is an apocalyptic number.

1205049400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1205049400 is an abundant number, since it is smaller than the sum of its proper divisors (1596690920).

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

1205049400 is a wasteful number, since it uses less digits than its factorization.

1205049400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6025263 (or 6025254 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1205049400 is about 34713.8214548615. The cubic root of 1205049400 is about 1064.1469801853.

The spelling of 1205049400 in words is "one billion, two hundred five million, forty-nine thousand, four hundred".