1228293900 has 54 divisors (see below), whose sum is σ = 3850021812. Its totient is φ = 327544800.

The previous prime is 1228293889. The next prime is 1228293901. The reversal of 1228293900 is 93928221.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1228293901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 681486 + ... + 683285.

Almost surely, 2^1228293900 is an apocalyptic number.

1228293900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1228293900 is an abundant number, since it is smaller than the sum of its proper divisors (2621727912).

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

1228293900 is a wasteful number, since it uses less digits than its factorization.

1228293900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364791 (or 1364781 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1228293900 is about 35047.0241247385. The cubic root of 1228293900 is about 1070.9456513207.

The spelling of 1228293900 in words is "one billion, two hundred twenty-eight million, two hundred ninety-three thousand, nine hundred".