1228502500 has 45 divisors (see below), whose sum is σ = 2690327101. Its totient is φ = 490700000.

The previous prime is 1228502459. The next prime is 1228502531. The reversal of 1228502500 is 52058221.

The square root of 1228502500 is 35050.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 466300836 + 762201664 = 21594^2 + 27608^2 .

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1752150 + ... + 1752850.

Almost surely, 2^1228502500 is an apocalyptic number.

1228502500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1228502500 is the 35050-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1228502500

1228502500 is an abundant number, since it is smaller than the sum of its proper divisors (1461824601).

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

1228502500 is an frugal number, since it uses more digits than its factorization.

1228502500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426 (or 708 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The cubic root of 1228502500 is about 1071.0062737872.

Multiplying 1228502500 by its sum of digits (25), we get a square (30712562500 = 175250²).

1228502500 divided by its sum of digits (25) gives a square (49140100 = 7010²).

Multiplying 1228502500 by its product of nonzero digits (1600), we get a square (1965604000000 = 1402000²).

The spelling of 1228502500 in words is "one billion, two hundred twenty-eight million, five hundred two thousand, five hundred".