1228972400 has 30 divisors (see below), whose sum is σ = 2952607152. Its totient is φ = 491588800.

The previous prime is 1228972351. The next prime is 1228972453. The reversal of 1228972400 is 42798221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1535816 + ... + 1536615.

Almost surely, 2^1228972400 is an apocalyptic number.

1228972400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1228972400 is an abundant number, since it is smaller than the sum of its proper divisors (1723634752).

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

1228972400 is a wasteful number, since it uses less digits than its factorization.

1228972400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3072449 (or 3072438 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 1228972400 is about 35056.7026401514. The cubic root of 1228972400 is about 1071.1428090393.

The spelling of 1228972400 in words is "one billion, two hundred twenty-eight million, nine hundred seventy-two thousand, four hundred".