1225169388 has 30 divisors (see below), whose sum is σ = 3202835636. Its totient is φ = 408389688.

The previous prime is 1225169369. The next prime is 1225169399. The reversal of 1225169388 is 8839615221.

1225169388 is a `hidden beast` number, since 12 + 251 + 6 + 9 + 388 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1890370 + ... + 1891017.

Almost surely, 2^1225169388 is an apocalyptic number.

1225169388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1225169388 is an abundant number, since it is smaller than the sum of its proper divisors (1977666248).

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

1225169388 is a wasteful number, since it uses less digits than its factorization.

1225169388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3781403 (or 3781392 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 1225169388 is about 35002.4197449262. The cubic root of 1225169388 is about 1070.0367961259.

The spelling of 1225169388 in words is "one billion, two hundred twenty-five million, one hundred sixty-nine thousand, three hundred eighty-eight".