1240728900 has 36 divisors (see below), whose sum is σ = 3589843152. Its totient is φ = 330860960.

The previous prime is 1240728817. The next prime is 1240728917. The reversal of 1240728900 is 98270421.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2067582 + ... + 2068181.

Almost surely, 2^1240728900 is an apocalyptic number.

1240728900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240728900 is an abundant number, since it is smaller than the sum of its proper divisors (2349114252).

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

1240728900 is a wasteful number, since it uses less digits than its factorization.

1240728900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4135780 (or 4135773 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 1240728900 is about 35223.9818873449. The cubic root of 1240728900 is about 1074.5475362855.

The spelling of 1240728900 in words is "one billion, two hundred forty million, seven hundred twenty-eight thousand, nine hundred".