1228293920 has 48 divisors (see below), whose sum is σ = 3316396608. Its totient is φ = 421128960.

The previous prime is 1228293917. The next prime is 1228293923. The reversal of 1228293920 is 293928221.

It is an interprime number because it is at equal distance from previous prime (1228293917) and next prime (1228293923).

It is not an unprimeable number, because it can be changed into a prime (1228293923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547226 + ... + 549465.

It is an arithmetic number, because the mean of its divisors is an integer number (69091596).

Almost surely, 2^1228293920 is an apocalyptic number.

1228293920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1228293920 is an abundant number, since it is smaller than the sum of its proper divisors (2088102688).

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

1228293920 is a wasteful number, since it uses less digits than its factorization.

1228293920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096713 (or 1096705 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 1228293920 is about 35047.0244100694. The cubic root of 1228293920 is about 1070.9456571334.

The spelling of 1228293920 in words is "one billion, two hundred twenty-eight million, two hundred ninety-three thousand, nine hundred twenty".